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Description 📄:
The underground type A3 L92.2 number 579 is running on the U3 line, which connects the south-western suburbs of the capital with the eastern part of the centre. The U3 line, 19.7 km long and with 24 stations, has as its terminus Krumme Lanke in the west and Warschauer Strasse in the east. The U3 line has the special feature of being mainly outside, with the exception of the section between the Podbielskialle stop and Gleisdreiek. The outdoor part, in the city centre, runs on elevated bridges along the streets of the Friedrichshein and Kreuzberg districts. The other, open-air part runs through the districts of Dahlem and Zehlenodorf at a lower level than the street, past the Freie Universität.
The Berlin underground is divided into two, one with a small profile (Kleinprofil) and the other with a large profile (Grossprofil). The lines U1, U2, U3 and U4 are small profile, the remaining U5, U6, U7, U8 and U9 large profile. Both systems have the same normal gauge of 1435 mm, the main difference being in the profile size. In addition, both profiles are powered by a third side rail at 750 V DC; the difference, however, lies in the way the current is transmitted from the third rail to the train. In fact, in the small profile the train slider makes contact with the upper part of the rail, while in the large profile the contact is made in the lower part of the third rail. The third rail is the positive pole in the small profile, while in the large profile it is the negative pole. The type A3 L92 underground railway, was built to replace the type Gl, between 1993 and 1995 by ABB Henschel, AEG, O&K, Siemens and WU.
Information ℹ️:
Date 📅: 30.10.2024, 10:37
Place 📍: Berlin, Germany
Train 🚄: A3 L92.2 579
Train Company 🏢: BVG
Line 🔢: U3
Start 🚩: U Krumme Lanke
Destination 🏁: S+U Warschauer Strasse
©️The photo was taken and edited by Nathan Urriani. Use of the image by others is only allowed with my permission.
first of mine from yesterday .to anyone thats hasn't been to gigrin ,please be aware these are wild birds ,the only difference is they are fed daily as a spectacle for the public .
“The great difference between voyages rests not with the ships, but with the people you meet on them.”
~Ameila E. Barr
This one is from the morning in Jamaica, and I loved how you could just barely see the reflections in the wet sand. I know I went a bit heavy on the processing on this one, but I wanted to really bring out the colors.
I went shooting this morning with Tyler Sharp around Pittsburgh. We got a ton of great shots, and I will try to get them up soon. If you haven't seen his work, take a look at this stream if you get a chance!
Have a great weekend my friends!!!
I don't mind invitations, but please no big, shiny, flashing, glitter graphics, they will be deleted. Also, please contact me if you would like to use my pictures for any reason, as all rights are reserved. Thanks!
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There are two types of Zebra in the world:
Type 1: Black body colour + white stripes
Type 2: White body colour + black stripes
Can you notice the differences?
Haha..... this is just a joke to make you have a big smile now@
Enjoy your smiling sunday@
Taken from inside the Delectables restaurant in Tucson, Arizona as the sun was going down. I liked the glowing colors from the neon itselft and the window glass and the reflection on the dusty blinds inside.
This is a photograph of a Feral Pigeon close-up headshot taken recently at Castle Park Broadmead Bristol England.
These birds are descendants of Rock Doves, with a more variable plumage pattern difference.
This beautiful bird had amazing orange eyes.
Photographed using a Canon Powershot SX530 HS camera.
7DWF Sunday:Theme Fauna
by Sean Walsh.
The worst joke is the one you have to explain.
One picture shows the doll when their box was opened for the first time.
The other shows them put in again after their first photoshoot.
One difference should be obvious, the dolls have changed places. Others are harder to spot.
Can you find them all?
Sign of the Times
Poppy Parker
Attitude is a little thing that makes a big difference
Gloomy weather today. Took this right outside my doorstep, but not sure what does little flowers are called. Heard from some of my friends that our local Cherry Blossom has bloomed, and I promised myself not to miss it like last year.
Hope everyone have a relaxing sunday!
Copyright © 2010 Studio494 Production
Ok so I took an almost exact same shot a week ago of the same E400 but what's changed...?
If you want to cheat here is my other shot -
www.flickr.com/photos/capuchinoking/14850774571/
:-)
Listen. -- and cry. Beautiful song.
FIRST OFF: I realize I have been quite absent the whole summer. And although I have actually seen a lot of your photos lately I feel terrible for not taking the time to comment and talk to you. I am stuck in this weird state when I feel like I am super busy all the time, when in reality I haven't been doing that much. I just got back from Girls Camp and next week will be seeing relatives I don't often see. It actually will be getting busy with the beginning of my first high school year (I will be a sophomore) approaching. I hope you all haven't lost hope in me and moved on, because I still think all of you are amazing.
SECOND: My family went to this old mine ruin for family night. There was graffiti everywhere. I wouldn't say it was the vulgar type of graffiti. I read the most interesting things on those walls. I will be uploading more from the adventure in the next few days.
PS. If you have sent me a message and I haven't responded I will try to tonight or tomorrow.
:D
Dear Journal,
It is strange, the difference between the feeling of sailing carelessly through the vastness of open sky, and the feeling of staring down into the black, bottomless throat of a cavern. Instead of seeing as far as one may wish to look, one’s vision is blocked by the impassable, unwavering blackness.
“Ready, Mister Zenas?” my friend John called down.
“Ready!” I lied.
The rope descended, and I with it. Down, down, down… I was lowered deeper and deeper into the increasingly cold heart of the island. Oh, the places I’ll go and the things I’ll do in the name of discovery! The tantalizing temptation of finding the treasure drew me irresistibly… in spite of the increasing sense of claustrophobia that clasped its tight embrace about me.
At long, long last, I touched down on the soggy, gritty surface of the cavern floor and, clutching my rope, peered around into the absolute midnight of the massive cave. Behind me, there, something caught my eye. A tiny glimmer of light – it came from a small tunnel. I could hear the sloshing sound of water as I slowly inched towards it.
Once through, I encountered another cavern, smaller than the last one and… surprisingly beautiful. Purplish foliage clambered down from the heights above, and amid the rocks grew pockets of glowing mushrooms, quietly lighting the shadows. A collection of small waterfalls fed several trickling rivers that drained into a rushing whirlpool on the left of the cavern. In the center of the cavern was a small isle of wet sand, in the middle of which stood a lone column, atop which laid a small, golden artifact. The moment I espied it I knew, after weeks of travel, I had found what I sought.
I crept up towards it in the soft beam of light, mist drifting hazily around me. I circled the item, examining its every beautiful detail before I could dare to reach out and lift it up from its base.
But then, Journal, the unmistakable sound of a flintlock pistol being cocked echoed off the walls of the rocky chamber. I froze, the untouched golden relic still before me, and slowly glanced up to see a figure standing opposite me.
“I will not insult your intelligence, Mr. Abbington, as long as you do not explore the boundaries of my patience.” A confident and mellifluous voice flowed from the tall, mysteriously black-clad figure. His pistol gleamed, aimed directly at my heart. Terrifyingly, one could not see his features, for his face was entirely covered in spotless, filmy cloth. No doubt he could see outwards, but none could look in at him.
I was shivering. “Who-o-o are you?”
“I see no purpose in divulging my identity to you, nor that of my companion.” To my horror, another figure, similarly dressed, though a bit heftier in the shoulders, stood just past him. He too was armed with a flintlock.
Suddenly my thoughts darted in a different direction. “Wait, what have you done with John?”
“Your companion? I underestimated the speed and agility of his craft. He sailed off and made good his escape. I am certain he understood the message of my cannons and he shall not be trifling with me any further.” A tiny click announced the removal of his weapon’s safety latch. “Now, Mr. Abbington, as your conversational abilities leave much to be desired… the tablet, if you please.”
It was then that I saw my opportunity. I snatched the golden square and held it, ready to cast into the whirlpool swirling just within reach of me. The man and his companion started in shock.
“Now, you masked man, I will not insult your intelligence. Lower your weapon and leave, or I shall toss this tablet to the waters.”
The stranger chuckled menacingly. “I am more than prepared to murder for that tablet. Are you prepared to die for it?”
“I suppose I will have to find out!” I cried, hurling myself and said tablet into the whirlpool in one swift dive.
I shall write again, dear Journal, as soon as I may, and explain just how I came to be writing this entry and not drowned.
-Zenas Abbington
The Bara Gumbad, or "big dome," is a large domed structure grouped together with the Friday mosque of Sikander Lodi and a mehman khana (guesthouse), located in New Delhi's Lodi Gardens. The buildings were constructed at different times during the Lodi era and occupy a common raised platform. Formerly an outlying area of Delhi, the Lodi Gardens are a British-planned landscaped garden which includes a number of monuments (primarily tombs) from the Sayyid and the Lodi dynasties. Originally called Willingdon Park, the gardens were located in the former village of Khairpur, now on the edge of Lutyen's Delhi, the colonial capital built by the British in the early 20th century. The gardens, which cover approx. 70 acres, have come to be surrounded by institutional buildings and some of contemporary Delhi's most expensive real estate.
Although they were built under the same dynasty, each of the three structures was undertaken separately. The Bara Gumbad, completed in 1490, is considered to have the first full dome constructed in Delhi. Its original purpose is contested; although it appears to be a freestanding tomb, it contains no tombstone. This causes the speculation that the building might have been intended as a gateway for the Friday mosque; however, their respective placements, stylistic differences, and construction dates do not support this theory. The Friday mosque, completed in 1494, is the first example of the new mosque type that developed during the Lodi era. Characterized by a relatively simple five bay prayer hall building adjacent to a simple open courtyard, this type was an important precedent for mosque architecture in the Lodi and Mughal eras.
The complex can be accessed from various points along the roads bordering the Lodi Gardens, with the access from the Lodi road towards the south most prominent. The buildings are situated at a distance of about 300 meters from Muhammad Shah's tomb towards the south and about 380 meters from Sikander Lodi's tomb towards the north. Another prominent structure, the Shish Gumbad, is located facing the Bara Gumbad at a distance of about seventy-five meters towards the north. The area surrounding the buildings is landscaped with manicured grass lawns. Few trees are planted in the immediate vicinity, leaving the view of the structures unobscured. The path winding through the Lodi Gardens approaches the buildings axially from the north, although the building plinth is accessible all from all sides.
The buildings are sited on a three-meter-high platform, measuring approximately 30 meters (east-west) by 25 meters (north-south). The Friday mosque is located along the western edge of the platform; the guesthouse is sited opposite it, occupying the eastern edge, while the Bara Gumbad is located along the southern edge. Stone masonry walls, about six meters high, connect the three structures along the southern edge. The northern edge is provided with staircases for accessing the platform. A centrally located straight flight comprising of eight steps, about ten meters wide, connects the ground to a generous mid landing. Another 'C' shaped flight of eight steps wraps around the landing, creating an amphitheatre-like space and reaching the top of the platform. The current arrangement of steps appears to be more recent, and the remains of walls adjoining the southern face of the guesthouse and the mosque indicate that the northern edge might have originally been walled. In the center of the raised court, with its southern edge along the staircase, are the remains of a square shaped platform, 8 meters wide, which appears to be a grave.
Friday mosque:
The Friday mosque is a single aisled, rectangular building, approx. 30 meters (north-south) by 8 meters (east-west). The mosque is organized in five unequal bays, which correspond to the five arched doorways on the eastern (entry) elevation. The width of the arched doorways decreases from the center towards the sides. The arches span across grey granite piers. The central arch is framed within a projecting rectangular portal, measuring about 8 meters in height by 6 meters wide. The piers of the rectangular frame are cased in dressed granite and have three shallow arched niches in red sandstone, occurring vertically above the springing point of the arch, on either side. The doorway itself is described by four receding planes of ogee arches, the outermost one being in line with the external face of the rectangular portal. The doorways immediately to the side of the central portal are about 5 meters wide, while those at the two ends are approx. 1.5 meters wide with two receding planes of ogee arches, adding to the prominence of the central doorway. The apex of each innermost arch is constant, measuring approx. 5 meters from the top of the platform. Each arch is finished in plaster and embellished with intricate carved Arabic inscriptions. The spandrels are also heavily carved with geometric motifs, and their the corners are adorned with round inscribed plaster medallions. Red sandstone eaves (chajjas) on stone brackets top the arches, interrupted only by the central projecting portal that extends above them. There is a blank plastered frieze above the eaves, followed by the projecting horizontal bands of the cornice that is topped by a blind masonry parapet adorned with petal shaped crenellations with inscribed plaster medallions.
The interior of the prayer hall reflects the five bay division of the eastern elevation. It is a rectangular space, measuring about 27 meters (north-south) by about 7 meters (east-west). Additional arches spanning between the piers on the eastern elevation and the engaged piers of the western wall emphasize the demarcation of the interior space into bays. These internal ogee arches reach a height of about five meters. They are finished in plaster and profusely decorated with carvings of Arabic inscriptions. The piers are unornamented, dressed gray granite.
The qibla (western) wall of the prayer hall is a blind wall divided into five unequal bays expressed as recessed ogee arched niches, reflecting the arched openings on the eastern wall. The two bays adjacent to the central bay have three equal niches carved out from the portion below the springing line of the main arch. These niches are separated by granite piers, which have smaller arched niches in the top third of their elevation. The three niches are made of two layers of ogee arches framed by the piers. The external layer is in gray-yellow granite, while the interior arch is made of red sandstone. The central niche is mildly distinguishable from the others because its arched portion is curved and the imposts are engraved, while those of the adjacent arches are plain. The innermost rectangular portion of the central niche is blank, while that of the adjoining niches has the carving of a vase and flora inscribed in it. The tympanum of the main outer arch is finished in plaster and has an additional niche directly above the central niche which is embellished heavily with plaster carvings of Arabic inscriptions. A band of similar inscriptions runs along the interior perimeter of the arch and around the upper niche in a closed loop. The voussoirs of the outer arch are plastered and embellished with another layer of carvings. The central bay of the western wall also has three niches, each made of four recessed planes of alternating rectangular and arched profiles. The central mihrab niche is taller and wider. It is also shallower and the innermost plane is blank, while the other two niches are deeper set with relief work. A stone minbar with three steps has been provided abutting the northern pier of the central niche.
Hemispherical domes cover the three central bays, while the terminal bays are covered by low flat vaulted ceilings. The square plan of the three central bays transitions into an octagonal drum through the application of corbelled pendentives at the corners. The corbelling occurs in four layers, which increases in width from the bottom up. The layers are further embellished with curved niches set into rectangular frames, which also increase in number, the lowest corbel having one and the last corbel having five such niches. The last layers of the pendentives form alternate edges of the octagonal drum; the remaining edges being formed by the extension of the walls and are also provided with similar curved niches. The octagonal drum transitions into a hexadecagon, followed by a thirty-two-sided polygon by the provisions of small struts. Each face of the hexadecagon is provided with shallow niches, while the thirty-two-sided polygon is described by a projecting band of red sandstone, followed by a band of inscriptions finally topped by the hemispherical dome. The dome is finished in plain plaster. The voussoirs of the arches, the pendentives and the tympanum are all covered by intricate stucco Arabic inscriptions. The central dome is relatively higher that the other two domes.
The northern and southern walls of the mosque are punctured by ogee arch doorways below the springline of the main arch. Each opening leads to a projecting balcony, comprising of red sandstone posts supporting a tiered roof. The balconies protrude out from the faade and are supported on red sandstone brackets, whose profiles and carvings are characteristic of Hindu architecture. An elaborately carved arched niche is provided above each opening on the interior wall. It is set into a rectangular frame embossed with Arabic text.
The plasterwork on the external northern and southern walls of the mosque has fallen off, exposing the stone masonry, while that on the western wall has survived. The central bay of the western wall projects out and is marked by two solid towers at the corners. These towers are divided vertically into four layers; the first two layers from the bottom are orthogonal, while the third layer has alternating curved and angular fluting; the top layer, extending over the parapet of the mosque, has a circular section. The corners of the mosque are marked by similar tapering towers, which are divided into four layers. Each layer is circular in plan except the third layer, which is described by alternating curved and angular fluting. All the towers have the remains of finials at their apex. The central projecting wall has four red sandstone brackets in its upper third portion, which may have supported a projecting balcony similar to those on the north and south elevations.
The plasterwork on the walls of the plinth is now gone, exposing the rubble masonry construction below. The western face of the plinth is punctured by five ogee arch openings set into rectangular frames, one in the center and two each on the sides. These openings provide access to the basement within the plinth.
The roof has three domes corresponding to the three central bays of the prayer hall and the three central arches on the eastern elevation. The extrados of the domes are finished in plaster. The octagonal drums supporting the domes protrude out over the roof level, above which the circular bases of the domes are decorated with blind crestings having floral motifs. The central dome is marginally larger than the adjacent domes and all three have the remains of lotus finials at their apex.
Bara Gumbad:
Square in plan, the Bara Gumbad measures approx. 20 meters per side. Set on a plinth 3 meters high, it joins the common plinth on the north and projects beyond it to the south. Its plinth is decorated on the east, south, and west with ogee arch openings set into rectangular frames. These provide access to a basement.The walls of the Bara Gumbad are approx. 12 meters tall, above which a hemispherical dome on a hexadecagonal drum extends another 14 meters from the roof level, for a total building height of 29 meters above ground level.
Each of its elevations is nearly identical and divided into 2 horizontal sections. A projecting portal composed of an ogee arch set in a rectangular frame (approx. 8 meters wide), is centered in each elevation and rises approximately 75 cm above the parapet line of the building. The 1.5 meter wide frame is made of dressed gray granite. Each vertical pier of the frame has six shallow red sandstone niches arranged atop one another at varying heights; nine niches continue in a line along the horizontal portion of the frame. The portal is described by two receding planes of grey granite ogee arches; the spandrels are cased with black granite with a thin projecting edge of red sandstone. Two round plaster medallions adorn the spandrels. The lower layer of the portal has a central doorway, spanned by two red sandstone brackets that form a trabeated arch supporting a black granite lintel. These brackets are supported on grey granite posts. An intricately carved red sandstone frame adorns the brackets and the lintel; it starts at the springing point of the arch and frames the lintel of the doorway. The entire composition is set in a rectangular yellow sandstone frame. An ogee arch window has been provided above the trabeated entrance. The portal is crowned by the arched crenellations of the blind parapet. Solid turrets mark the projecting corners of the portal.
The remainder of the elevation, that flanking the central portal on either side and recessed behind it, is divided vertically into two equivalent parts by projecting horizontal bands of stone. Each part is described by two equal arched panels set into rectangular frames. Both the panels of the upper part on either side of the portal are blind and filled with granite masonry. The lower panels located adjacent to the portal are windows, while the lower panels at the edges are filled in. The parapet, like the portal, is decorated with arched crenellations, and the roof has solid turrets at each corner.
A single hemispherical dome surmounted on a sixteen-sided drum crowns the building. Each face of the drum is described by an ogee arched niche set in a rectangular frame. The voussoirs of the arches are gray granite, while the spandrels are clad with red sandstone. The top edge of the drum is decorated with a band of arched crenellations, similar to those on the roof parapets, running above a projecting band of stone that surrounds the drum. Below this projection is band of leaves carved in relief. The extrados of the dome are finished in smooth plaster. The lotus base, possibly for a vanished calyx finial, is still extant.
The structure can be entered either from the raised courtyard via the north elevation or from a double flight of steps located on the western elevation. Inside, the square building measures about seven meters per side. An 80 cm high, 45 cm wide solid seat runs continuously along the interior perimeter of the building. Light streams in from all four walls, which are punctured by the openings of the doorway at the ground level and the ogee arch window above. The interior surfaces of the Gumbad are unornamented and finished in dressed granite. The square plan of the room transitions into an octagon via squinches, which then support the thirty-two-sided drum and the dome. The apex of the dome has two bands of floral inscriptions; otherwise, the dome is finished in plaster. The absence of historical inscriptions has contributed to the confusion over the original purpose of the Bara Gumbad.
Mehman Khana:
The third structure in the group is rectangular in plan, measuring about 27 meters (north-south) by 7 seven meters (east-west). Located along the eastern edge of the common plinth, it faces the mosque and is connected to the Bara Gumbad by a masonry wall along its northern face. The structure is believed to have either been a mehman khana, (guesthouse) or a majlis khana (assembly hall).
The building is accessed from the common plinth through its western wall, which is divided into five bays, mirroring the eastern elevation of the mosque opposite it. The three central bays are considerably larger and have ogee arch doorways, giving access to the interior, while windows puncture the smaller end bays. The arches are set in rectangular frames, which are recessed from the face of the elevation. Each opening is composed of two recessed planes of arches. The spandrels are clad in red sandstone, contrasting with the gray granite of the elevation, and are decorated with round plaster medallions with lotus motifs. The window openings have an additional tie beam or lintel at the springline. The tympanum of the window towards the south has been filled with stone, while that of the window towards the north has been left open. A continuous chajja, supported on equidistant stone brackets, projects from the western wall above the rectangular frame. The cornice is unornamented and is topped by the projecting horizontal band of the parapet, which reaches a height of approximately five meters from the top of the raised plinth. The roof of the structure is flat. The exterior of the building lacks decoration and is finished in dressed granite.
The interior is divided into seven chambers occurring from north to south; the central chamber is the largest, measuring about 5 meters (north-south) long. It is abutted by relatively narrow chambers (approx. 2.5 meters long). The outside chambers which flank the 2.5 meter wide chambers on either side are approximately the size of the central chamber, and correspond to the arched openings in the western wall. The chambers are separated from each other by gray granite walls, punctured by simple ogee arched doorways set in rectangular frames. Square in plan, the outer rooms are separated from the adjacent chambers by stone walls with rectangular door openings with blind ogee arches and rectangular frames. Each doorway has shallow rectangular recesses on either side, as well as a small arched window set into a rectangular recess and a stone jali screen set above the doorway within the tympanum of the main arch. The eastern wall of the building has blind ogee arches, occurring as two successive planes, reflecting the arched openings of the western elevation.
The roof of the central chamber is flat and supported on arches located on four sides; flat stone brackets appear at the corners. The two adjacent rooms are covered by shallow domes supported on squinches. The interior domes are finished in plaster with carved concave fluting. The exterior of the domes has been filled to blend with the flat roof of the central room.
Certain stylistic continuities are recognizable in the three buildings; each was constructed with (local) gray granite and lime mortar. However, the degree and type of embellishment, both interior and exterior, on the mosque differs substantially from that found on the other two, relatively unadorned, buildings.
Apart from the grouping of the three structures and their stylistic similarities, the buildings do not appear to have been planned as a complex. The Friday mosque is the first example of the panchmukhi building type, where "panch" (five) and "mukhi " (facade) characterize a five-bay prayer hall. This approach was influential in both the Lodi and the Mughal periods. The Bara Gumbad is significant for having the first complete hemispherical dome in Delhi.
The differences in the surface ornament of the buildings suggest that the buildings were constructed at different times, with the Bara Gumbad and the guesthouse being similar in style and decoration, without the multilayered arches of the Friday mosque. The function of the Bara Gumbad is still unknown; its geometry and form aligns with the predominant tomb architecture of the period (like the neighboring Shish Gumbad). However, there is no grave or cenotaph in the building, and rather than being blank, its qibla wall (like its other walls) is punctured by an entrance. While the continuous stone bench in the interior is also found in gateway architecture, (as in the Alai Darwaza at the Quwat-ul-Islam Mosque in Mehrauli), the size of the Bara Gumbad vis-a-vis the Friday mosque does not support this conjecture. Some scholars surmise that the structure might have been a gateway to the larger complex of tombs within the Lodi Gardens.
Lodi Dynasty
-----------------
The Lodi dynasty in India arose around 1451 after the Sayyid dynasty. The Lodhi Empire was established by the Ghizlai tribe of the Afghans. They formed the last phase of the Delhi Sultanate. There were three main rulers in the history of Lodi dynasty. All three of them have been discussed in detail in the following lines. So read on about the Lodi dynasty history.
Buhlul Khan Lodi
Buhlul Khan Lodi (1451-1489) was the founder of the Lodi dynasty in India and the first Afghan ruler of Delhi. He was an Afghan noble who was a very brave soldier. Buhlul Khan seized the throne without much resistance from the then ruler, Alam Shah. His territory was spread across Jaunpur, Gwalior and northern Uttar Pradesh. During his reign in 1486, he appointed his eldest son Barbak Shah as the Viceroy of Jaunpur. Though he was an able ruler, he really couldn't decide as to which son of his should succeed him as the heir to the throne.
Sikandar Lodi
After the death of Buhlul Khan, his second son succeeded him as the king. He was given the title of Sultan Sikander Shah. He was a dedicated ruler and made all efforts to expand his territories and strengthen his empire. His empire extended from Punjab to Bihar and he also signed a treaty with the ruler of Bengal, Alauddin Hussain Shah. He was the one who founded a new town where the modern day Agra stands. He was known to be a kind and generous ruler who cared for his subjects.
Ibrahim Lodhi
Ibrahim Lodhi was the son of Sikander who succeeded him after his death. Due to the demands of the nobles, his younger brother Jalal Khan was given a small share of the kingdom and was crowned the ruler of Jaunpur. However, Ibrahim's men assassinated him soon and the kingdom came back to Ibrahim Lodhi. Ibrahim was known to be a very stern ruler and was not liked much by his subjects. In order to take revenge of the insults done by Ibrahim, the governor of Lahore Daulat Khan Lodhi asked the ruler of Kabul, Babur to invade his kingdom. Ibrahim Lodhi was thus killed in a battle with Babur who was the founder of the Mughal dynasty in India. With the death of Ibrahim Lodhi, the Lodhi dynasty also came to an end.
Album : Bus Eireann.
Bus Eireann Volvo B10M /Caetano Algarve whilst on seasonal once weekly route 493.
This is a day tour beginning and ending in Sligo. The bus is pictured between Glenveigh and Dunlewey in Co Donegal, between Glenveagh National Park and Dunlewey on a miserable wet July day
At the time VC126 was based in Stranorlar garage. The tour (seasonal route 493) was a day long affair all along some of the most scenic parts of north west Ireland.
From this point (most days ! ) there are stunning views along the 'Poisoned Glen'.
According to local literature the source of the name is interesting. The name 'the Poisoned Glen' is probably a mistranslation of the Irish name. In earlier days locals would have only spoken Irish and they called this place 'Gleann Nemhe' ~ The Heavenly Glen. The name in Irish for heaven is Neamh and the word for poison in Irish is neimhe ~ just one letter difference so it is easy to see how the words may have been mixed up when translated to English. At any rate, the name Heavenly Glen so much better describes this beautiful place.
Mirit Ben Nun: Shortness of breath
'Shortness of breath' is not only a sign of physical weakness, it is a metaphor for a mental state of strong desire that knows no repletion; more and more, an unbearable glut, without repose. Mirit Ben Nun's type of work on the other hand requires an abundance of patience. This is a Sisyphean work (requiring hard labor) of marking lines and dots, filling every empty millimeter with brilliant blots. Therefore we are facing a paradox or a logical conflict. A patient and effortful work that stems from an urgent need to cover and fill, to adorn and coat. Her craft of layering reaches a state of a continuous ceremonial ritual.
This ritual digests every object into itself - useful or discarded -- available and ordinary or rare and exceptional -- they submit and devote to the overlay work. Mirit BN gathers scrap off the streets -- cardboard rolls of fabric, assortments of wooden boards and pieces, plates and planks -- and constructs a new link, her own syntax, which she alone is fully responsible for. The new combination -- a type of a sculptural construction -- goes through a process of patching by the act of painting.
In fact Mirit regards her three dimensional objects as a platform for painting, with a uniform continuity, even if it has obstacles, mounds and valleys. These objects beg her to paint, to lay down colors, to set in motion an intricate weave of abstract patterns that at times finds itself wandering the contours of human images and sometimes -- not. In those cases what is left is the monotonous activity of running the patterns, inch by inch, till their absolute coverage, till a short and passing instant of respite and than on again to a new onset.
Next to this assembly of garbage and it's recycling into 'painted sculptures' Mirit offers a surprising reunion between her illustrated objects and so called cheap African sculpture; popular artifacts or articles that are classified in the standard culture as 'primitive'.
This combination emphasizes the difference between her individualistic performance and the collective creation which is translated into cultural clichés. The wood carved image creates a moment of peace within the crowded bustle; an introverted image, without repetitiveness and reverberation. This meeting of strangers testifies that Mirit' work could not be labeled under the ´outsiders art´ category. She is a one woman school who is compelled to do the art work she picked out to perform. Therefore she isn't creating ´an image´ such as the carved wooden statues, but she produces breathless ´emotional jam' whose highest values are color, motion, beauty and plenitude. May it never lack, neither diluted, nor dull for even an instant
Tali Tamir
A compact experiment aimed at enhancing cybersecurity for future space missions is operational in Europe’s Columbus module of the International Space Station, running in part on a Raspberry Pi Zero computer costing just a few euros.
“Our CryptIC experiment is testing technological solutions to make encryption-based secure communication feasible for even the smallest of space missions,” explains ESA software product assurance engineer Emmanuel Lesser. “This is commonplace on Earth, using for example symmetric encryption where both sides of the communication link share the same encryption key.
“In orbit the problem has been that space radiation effects can compromise the key within computer memory causing ‘bit-flips’. This disrupts the communication, as the key on ground and the one in space no longer match. Up to now this had been a problem that requires dedicated – and expensive – rad-hardened devices to overcome.”
Satellites in Earth orbit might be physically remote, but still potentially vulnerable to hacking. Up until recently most satellite signals went unencrypted, and this remains true for many of the smallest, cheapest mission types, such as miniature CubeSats
But as services delivered by satellites of all sizes form an increasing element of everyday life, interest in assured satellite cybersecurity is growing, and a focus of ESA’s new Technology Strategy for this November’s Space19+ Ministerial Council
.
CryptIC, or Cryptography ICE Cube, - the beige box towards the top of the image, has been a low-cost development, developed in-house by ESA’s Software Product Assurance section and flown on the ISS as part of the International Commercial Experiments service – ICE Cubes for short. ICE Cubes offer fast, simple and affordable access for research and technology experiments in microgravity using compact cubes. CryptIC measures just 10x10x10 cm.
“A major part of the experiment relies on a standard Raspberry Pi Zero computer,” adds Emmanuel. “This cheap hardware is more or less flying exactly as we bought it; the only difference is it has had to be covered with a plastic ‘conformal’ coating, to fulfil standard ISS safety requirements.”
The orbital experiment is operated simply via a laptop at ESA’s ESTEC
technical centre in the Netherlands, routed via the ICE Cubes operator, Space Applications Services in Brussels.
“We’re testing two related approaches to the encryption problem for non rad-hardened systems,” explains ESA Young Graduate Trainee Lukas Armborst. “The first is a method of re-exchanging the encryption key if it gets corrupted. This needs to be done in a secure and reliable way, to restore the secure link very quickly. This relies on a secondary fall-back base key, which is wired into the hardware so it cannot be compromised. However, this hardware solution can only be done for a limited number of keys, reducing flexibility.
“The second is an experimental hardware reconfiguration approach which can recover rapidly if the encryption key is compromised by radiation-triggered memory ‘bit flips’. A number of microprocessor cores are inside CryptIC as customisable, field-programmable gate arrays (FPGAs), rather than fixed computer chips. These cores are redundant copies of the same functionality. Accordingly, if one core fails then another can step in, while the faulty core reloads its configuration, thereby repairing itself.”
In addition the payload carries a compact ‘floating gate’ dosimeter to measure radiation levels co-developed by CERN, the European Organisation for Nuclear Research, as part of a broader cooperation agreement
.
And as a guest payload, a number of computer flash memories are being evaluated for their orbital performance, a follow-on version of ESA’s ‘Chimera’ experiment which flew on last year’s GomX-4B CubeSat
.
The experiment had its ISS-mandated electromagnetic compatibility testing carried out in ESTEC’s EMC Laboratory
.
“CryptIC has now completed commissioning and is already returning radiation data, being shared with our CERN colleagues,” adds Emmanuel. “Our encryption testing is set to begin in a few weeks, once we’ve automated the operating process, and is expected to run continuously for at least a year.”
Credits: ESA; CC BY-SA 3.0 IGO
My brother in law married a beautiful English girl and our families finally met. I just wish there was some way to tell who the americans are?
A giant tortoise at the Charles Darwin Research Station on Santa Cruz
Galapagos Giant Tortoise
The Galápagos tortoise or Galápagos giant tortoise (Geochelone nigra) is the largest living tortoise, native to seven islands of the Galápagos archipelago. The Galápagos tortoise is unique to the Galápagos Islands. Fully grown adults can weigh over 300 kilograms (661 lb) and measure 1.2 meters (4 ft) long. They are long-lived with a life expectancy in the wild estimated to be 100-150 years. Populations fell dramatically because of hunting and the introduction of predators and grazers by humans since the seventeenth century. Now only ten subspecies of the original twelve exist in the wild. However, conservation efforts since the establishment of the Galápagos National Park and the Charles Darwin Foundation have met with success, and hundreds of captive-bred juveniles have been released back onto their home islands. They have become one of the most symbolic animals of the fauna of the Galápagos Islands. The tortoises have very large shells (carapace) made of bone. The bony plates of the shell are integral to the skeleton, fused with the ribs in a rigid protective structure. Naturalist Charles Darwin remarked "These animals grow to an immense size ... several so large that it required six or eight men to lift them from the ground.". This is due to the phenomenon of island gigantism whereby in the absence of natural predation, the largest tortoises had a survival advantage and no disadvantage in fleeing or fending off predators. When threatened, it can withdraw its head, neck and all forelimbs into its shell for protection, presenting a protected shield to a would-be predator. The legs have hard scales that also provide armour when withdrawn. Tortoises keep a characteristic scute pattern on their shell throughout life. These have annual growth bands but are not useful for aging as the outer layers are worn off. There is little variation in the dull-brown colour of the shell or scales. Physical features (including shape of the shell) relate to the habitat of each of the subspecies. These differences were noted by Captain Porter even before Charles Darwin. Larger islands with more wet highlands such as Santa Cruz and the Alcedo Volcano on Isabela have lush vegetation near the ground. Tortoises here tend to have 'dome-back' shells. These animals have restricted upward head movement due to shorter necks, and also have shorter limbs. These are the heaviest and largest of the subspecies.Smaller, drier islands such as Española and Pinta are inhabited by tortoises with 'saddleback' shells comprising a flatter carapace which is elevated above the neck and flared above the hind feet. Along with longer neck and limbs, this allows them to browse taller vegetation. On these drier islands the Galápagos Opuntia cactus (a major source of their fluids) has evolved a taller, tree-like form. This is evidence of an evolutionary arms race between progressively taller tortoises and correspondingly taller cacti. Saddlebacks are smaller in size than domebacks. They tend to have a yellowish color on lower mandible and throat. At one extreme, the Sierra Negra volcano population that inhabits southern Isabela Island has a very flattened "tabletop" shell. However, there is no saddleback/domeback dualism; tortoises can also be of 'intermediate' type with characteristics of both. The tortoises are slow-moving reptiles with an average long-distance walking speed of 0.3 km/h (0.18 mph). Although feeding giant tortoises browse with no apparent direction, when moving to water-holes or nesting grounds, they can move at surprising speeds for their size. Marked individuals have been reported to have traveled 13 km in two days. Being cold-blooded, the tortoises bask for two hours after dawn, absorbing the energy through their shells, then becoming active for 8–9 hours a day. They may sleep for about sixteen hours in a mud wallow partially or submerged in rain-formed pools (sometimes dew ponds formed by garua-moisture dripping off trees). This may be both a thermoregulatory response and a protection from parasites such as mosquitoes and ticks. Some rest in a 'pallet'- a snug depression in soft ground or dense brush- which probably helps to conserve heat and may aid digestion. On the Alcedo Volcano, repeated use of the same sites by the large resident population has resulted in the formation of small sandy pits. Darwin observed that: "The inhabitants believe that these animals are absolutely deaf; certainly they do not overhear a person walking near behind them. I was always amused, when overtaking one of these great monsters as it was quietly pacing along, to see how suddenly, the instant I passed, it would draw in its head and legs, and uttering a deep hiss fall to the ground with a heavy sound, as if struck dead." The tortoises can vocalise in aggressive encounters, whilst righting themselves if turned upside down and, in males, during mating. The latter is described as "rhythmic groans". The tortoises are herbivorous animals with a diet comprising cactus, grasses, leaves, vines, and fruit. Fresh young grass is a favorite food of the tortoises, and others are the 'poison apple' (Hippomane mancinella) (toxic to humans), the endemic guava (Psidium galapageium), the water fern (Azolla microphylla), and the bromeliad (Tillandsia insularis). Tortoises eat a large quantity of food when it is available at the expense of incomplete digestion. Its favorite food is grasses. The tortoise normally eat an average of 70 to 80 pounds a day. Tortoises have a classic example of a mutualistic symbiotic relationship with some species of Galápagos finch. The finch hops in front of the tortoise to show that it is ready and the tortoise then raises itself up high on its legs and stretches out its neck so that the bird can pick off ticks that are hidden in the folds of the skin (especially on the rear legs, cloacal opening, neck, and skin between plastron and carapace), thus freeing the tortoise from harmful parasites and providing the finch with an easy meal. Other birds, including Galápagos Hawk and flycatchers, use tortoises as observation posts from which to sight their prey. Mating occurs at any time of the year, although it does have seasonal peaks between January and August. When two mature males meet in the mating season they will face each other, rise up on their legs and stretch up their necks with their mouths open to assess dominance. Occasionally, head-biting occurs, but usually the shorter loser tortoise will back off, leaving the other to mate with the female. In groups of tortoises from mixed island populations, saddleback males have an advantage over domebacks. Frustrated non-dominant males have been observed attempting to mate with other males and boulders. The male sniffs the air when seeking a female, bellows loudly, and bobs his head. The male then rams the female with the front of his shell and bites her exposed legs until she withdraws them, immobilizing her. Copulation can last several hours with roaring vocalisations from the males. Their concave shell base allows males to mount the females from behind. It brings its tail which houses the penis into the female's cloaca. After mating (June-December), the females journey up to several kilometres to reach nesting areas of dry, sandy ground (often near the coast). Nest digging can last from hours to days and is elaborate and exhausting. It is carried out blindly using only the hind legs to dig a 30 cm deep hole, into which she lays up to sixteen hard-shelled eggs the size of tennis balls. The female makes a muddy plug for the nest hole out of soil mixed with urine and leaves the eggs to incubate. In rocky areas, the eggs are deposited randomly into cracks. The young emerge from the nest after 120 to 140 days gestation later (December-April) and may weigh only 80 grams (2.8 oz) and measure 6 centimetres (2.4 in). Temperature plays a role in the sex of the hatchling: if the nest temperature is lower, more males will hatch; if it is high, more females will hatch. When the young tortoises emerge from their shells, they must dig their way to the surface, which can take up to a month. All have domed carapaces, and subspecies are indistinguishable. Galápagos Hawk used to be the only native predator of the tortoise hatchlings, as Darwin remarked: "The young tortoises, as soon as they are hatched, fall prey in great numbers to buzzards". Sex can be determined only when the tortoise is 15 years old, and sexual maturity is reached at 20 to 25 years old. The tortoises grow slowly for about 40 years until they reach their full size. Reproductive prime is considered to be from the ages of 60–90. The shape of the carapace of some subspecies of the tortoises is said to have reminded the early Spanish explorers of a kind of saddle they called a "galápago," and for these saddle-shaped tortoises they named the archipelago. Up to 250,000 tortoises inhabited the islands when they were discovered. Today only about 15,000 are left.
The inhabitants...state that they can distinguish the tortoise from different islands; and that they differ not only in size, but in other characters. Captain Porter has described those from Charles and from the nearest island to it, namely Hood Island, as having their shells in front thick and turned up like a Spanish saddle, whilst the tortoises from James Island are rounder, blacker, and have a better taste when cooked.---Charles Darwin 1845
There were probably twelve subspecies of Geochelone nigra in the Galápagos Islands, although some recognise up to 15 subspecies. Now only 11 subspecies remain, five on Isabela Island, and the other six on Santiago, Santa Cruz, San Cristóbal, Pinzón, Española and Pinta. Of these, the Pinta Island subspecies is extinct in the wild and is represented by a single individual (Lonesome George). In the past, zoos took animals without knowing their island of origin. Production of fertile offspring from various pairings of tortoises largely confirmed that they are subspecies and not different species. All the subspecies of giant tortoise evolved in Galápagos from a common ancestor that arrived from the mainland, floating on the ocean currents (the tortoises can drift for long periods of time as they are buoyant and can stretch head upwards to breathe). Only a single pregnant female or breeding pair needed to arrive in this way, and then survive, for Galápagos to be colonised. In the seventeenth century, pirates started to use the Galápagos islands as a base for resupply, restocking on food, water and repairing vessels before attacking Spanish colonies on the South American mainland. The tortoises were collected and stored live on board ships where they could survive for at least a year without food or water, providing valuable fresh meat, whilst their diluted urine and water stored in their neck bags could also be used as drinking water. Of the meat, Darwin wrote: "the breast-plate roasted (as the Gauchos do 'carne con cuero'), with the flesh on it, is very good; and the young tortoises make excellent soup; but otherwise the meat to my taste is indifferent." In the nineteenth century, whaling ships and fur-sealers collected tortoises for food and many more were killed for high grade 'turtle oil' from the late 1800s onward. Darwin described this process thus: "beautifully clear oil is prepared from the fat. When a tortoise is caught, the man makes a slit in the skin near its tail, so as to see inside its body, whether the fat under the dorsal plate is thick. If it is not, the animal is liberated and it is said to recover soon from this strange operation." A total of over 15,000 tortoises is recorded in the logs of 105 whaling ships between 1811 and 1844. As hunters found it easiest to collect the tortoises living round the coastal zones, the least decimated populations tended to be those in the highlands. Population decline accelerated with the early settlement of the islands, when they were hunted for meat, their habitat was cleared for agriculture and alien mammal species were introduced. Feral pigs, dogs, cats and black rats are effective predators of eggs and young tortoises, whilst goats, donkeys and cattle compete for grazing. In the twentieth century, increasing human settlement and urbanisation and collection of tortoises for zoo and museum specimens depleted numbers even more. The Galápagos giant tortoise is now strictly protected. Young tortoises are raised in a programme by the Charles Darwin Research Station in order to bolster the numbers of the extant subspecies. Eggs are collected from places on the islands where they are threatened and when the tortoises hatch they are kept in captivity until they have reached a size that ensures a good chance of survival and are returned to their original ranges. The Galápagos National Park Service systematically culls feral predators and competitors where necessary such as the complete eradication of goats from Pinta. The conservation project begun in the 1970s successfully brought 10 of the 11 endangered subspecies up to guarded population levels. The most significant recovery was that of the Española Tortoise, whose breeding stock comprised 2 males and 11 females brought to the Darwin Station. Fortuitously, a third male was discovered at the San Diego Zoo and joined the others in a captive breeding program. These 13 tortoises gave rise to over 1000 tortoises now released into their home island. In all, 2500 individuals of all breeds have been reintroduced to the islands. However, persecution still continues on a much smaller scale; more than 120 tortoises have been killed by poachers since 1990 and they have been taken hostage as political leverage by local fishermen.
Santa Cruz
With the largest human population in the Galapagos archipelago, Isla Santa Cruz is the most important of the Galapagos Islands. Meaning Holy Cross in Spanish, this island is also known as Indefatigable, after the HMS Indefatigable landed here long ago. The second largest island terms of land area at 986 sq km, Isla Santa Cruz is home to the key town of Puerto Ayora, the Charles Darwin Research Station and the headquarters of the Galapagos National Park Service. With its own airport on Isla Baltra a few miles away, Isla Santa Cruz is where most visitors who come to the Galapagos Islands usually stay. With a number of bars, hotels, restaurants and shops in Puerto Ayora, most tours of the Archipelago also usually begin from here.
Galapagos Islands
The Galápagos Islands (official name: Archipiélago de Colón; other Spanish names: Islas de Colón or Islas Galápagos) are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, some 900 km west of Ecuador. It is a UNESCO World Heritage site: wildlife is its most notable feature. Because of the only very recent arrival of man the majority of the wildlife has no fear of humans and will allow visitors to walk right up them, often having to step over Iguanas or Sea Lions.The Galápagos islands and its surrounding waters are part of a province, a national park, and a biological marine reserve. The principal language on the islands is Spanish. The islands have a population of around 40,000, which is a 40-fold expansion in 50 years. The islands are geologically young and famed for their vast number of endemic species, which were studied by Charles Darwin during the voyage of the Beagle. His observations and collections contributed to the inception of Darwin's theory of evolution by natural selection.
What a difference a day makes: It's strange to think that just 24 hours previously, I, along with many, many others affected by Hurricane Irma, were huddled inside, listening to gusts of hurricane-strength wind, wondering if the roof would hold, if a tornado (caused by the hurricane) was coming for us, wondering when the power would go out, or maybe wondering if the storm would wake Lauren. (For the record, it didn't. We put her to bed late, but she slept through Irma.)
I suppose the combination of Hurricane Irma clearing the air (I think that's a thing, after-storm air being more clear) and millions of Floridians without power and therefore, less light, makes this Milky Way photo novel, as it was taken just minutes away from my house. This is as opposed to the 60+ minute drive I normally endure in search of dark skies.
I'd normally spend more time processing this image, but I'm simply too tired, to the point where I'm sleep-editing, literally, falling asleep at my computer screen. So, I'm posting as is.
Details: 30 secs, ISO3200, f2.8 shot using a Canon full-frame sensor, taken at the western end of the Pineda, just to the west of I-95.
After learning about Tilt shift from another Flickr photographer, i thought i'd give it a try for myself and see how it would look. Honestly i dont think it looks too bad for a model railway effect but it was worth a shot at least!
The difference of the temperature of the morning and evening makes this miracle.
*Leica M9 *Summicron 50mm f/2.0 DR
en.wikipedia.org/wiki/Humpback_whale
The humpback whale (Megaptera novaeangliae) is a species of baleen whale. One of the larger rorqual species, adults range in length from 12–16 metres (39–52 ft) and weigh approximately 36,000 kilograms (79,000 lb). The humpback has a distinctive body shape, with unusually long pectoral fins and a knobbly head. An acrobatic animal known for breaching and slapping the water with its tail and pectorals, it is popular with whale watchers off Australia, New Zealand, South America, Canada, and the United States.
Males produce a complex song lasting 10 to 20 minutes, which they repeat for hours at a time. Its purpose is not clear, though it may have a role in mating.
Found in oceans and seas around the world, humpback whales typically migrate up to 25,000 kilometres (16,000 mi) each year. Humpbacks feed only in summer, in polar waters, and migrate to tropical or subtropical waters to breed and give birth in the winter. During the winter, humpbacks fast and live off their fat reserves. Their diet consists mostly of krill and small fish. Humpbacks have a diverse repertoire of feeding methods, including the bubble net feeding technique.
Like other large whales, the humpback was and is a target for the whaling industry. Once hunted to the brink of extinction, its population fell by an estimated 90% before a moratorium was introduced in 1966. While stocks have since partially recovered, entanglement in fishing gear, collisions with ships, and noise pollution continue to impact the 80,000 humpbacks worldwide.
Taxonomy
Humpback whales are rorquals (family Balaenopteridae), a family that includes the blue whale, the fin whale, the Bryde's whale, the sei whale and the minke whale. The rorquals are believed to have diverged from the other families of the suborder Mysticeti as long ago as the middle Miocene.[3] However, it is not known when the members of these families diverged from each other.
Though clearly related to the giant whales of the genus Balaenoptera, the humpback has been the sole member of its genus since Gray's work in 1846. More recently, though, DNA sequencing analysis has indicated the humpback is more closely related to certain rorquals, particularly the fin whale (Balaenoptera physalus), and possibly to the gray whale (Eschrichtius robustus), than it is to rorquals such as the minke whales.[4][5] If further research confirms these relationships, it will be necessary to reclassify the rorquals.
The humpback whale was first identified as baleine de la Nouvelle Angleterre by Mathurin Jacques Brisson in his Regnum Animale of 1756. In 1781, Georg Heinrich Borowski described the species, converting Brisson's name to its Latin equivalent, Balaena novaeangliae. In 1804, Lacépède shifted the humpback from the Balaenidae family, renaming it Balaenoptera jubartes. In 1846, John Edward Gray created the genus Megaptera, classifying the humpback as Megaptera longipinna, but in 1932, Remington Kellogg reverted the species names to use Borowski's novaeangliae.[6] The common name is derived from the curving of their backs when diving. The generic name Megaptera from the Greek mega-/μεγα- "giant" and ptera/πτερα "wing",[7] refers to their large front flippers. The specific name means "New Englander" and was probably given by Brisson due the regular sightings of humpbacks off the coast of New England.
Description
A humpback whale can easily be identified by its stocky body with an obvious hump and black dorsal coloring. The head and lower jaw are covered with knobs called tubercles, which are hair follicles, and are characteristic of the species. The fluked tail, which it lifts above the surface in some dive sequences, has wavy trailing edges.[8] The four global populations, all under study, are: North Pacific, Atlantic, and Southern Ocean humpbacks, which have distinct populations which complete a migratory round-trip each year, and the Indian Ocean population, which does not migrate, prevented by that ocean's northern coastline.
The long black and white tail fin, which can be up to a third of body length, and the pectoral fins have unique patterns, which make individual whales identifiable.[9][10] Several hypotheses attempt to explain the humpback's pectoral fins, which are proportionally the longest fins of any cetacean. The two most enduring mention the higher maneuverability afforded by long fins, and the usefulness of the increased surface area for temperature control when migrating between warm and cold climates.
Humpbacks have 270 to 400 darkly coloured baleen plates on each side of their mouths.[11] The plates measure from a mere 18 inches (46 cm) in the front to approximately 3 feet (0.91 m) long in the back, behind the hinge. Ventral grooves run from the lower jaw to the umbilicus about halfway along the underside of the whale. These grooves are less numerous (usually 14–22) than in other rorquals but are fairly wide.[11]
The stubby dorsal fin is visible soon after the blow when the whale surfaces, but disappears by the time the flukes emerge. Humpbacks have a 3 metres (9.8 ft), heart-shaped to bushy blow, or exhalation of water through the blowholes. Because humpback whales breathe voluntarily, the whales possibly shut off only half of their brains when sleeping.[12] Early whalers also noted blows from humpback adults to be 10–20 feet (3.0–6.1 m) high.
Newborn calves are roughly the length of their mother's head. At birth, calves measure 20 feet (6.1 m) at 2 short tons (1.8 t) The mother, by comparison, is about 50 feet (15 m). They nurse for approximately six months, then mix nursing and independent feeding for possibly six months more. Humpback milk is 50% fat and pink in color.
Females reach sexual maturity at the age of five, achieving full adult size a little later. Males reach sexual maturity at approximately seven years of age. Humpback whale lifespans range from 45–100 years.[13] Fully grown, the males average 13–14 m (43–46 ft). Females are slightly larger at 15–16 m (49–52 ft); the largest recorded specimen was 19 metres (62 ft) long and had pectoral fins measuring 6 metres (20 ft) each.[14] Body mass typically is in the range of 25–30 metric tons (28–33 short tons), with large specimens weighing over 40 metric tons (44 short tons).[15] The female has a hemispherical lobe about 15 centimetres (5.9 in) in diameter in its genital region. This visually distinguishes males and females.[11] The male's penis usually remains hidden in the genital slit.
Identifying individuals
The varying patterns on the tail flukes are sufficient to identify individuals. A study using data from 1973 to 1998 on whales in the North Atlantic gave researchers detailed information on gestation times, growth rates, and calving periods, as well as allowing more accurate population predictions by simulating the mark-release-recapture technique (Katona and Beard 1982). A photographic catalogue of all known North Atlantic whales was developed over this period and is currently maintained by College of the Atlantic.[16] Similar photographic identification projects have begun in the North Pacific by Structure of Populations, Levels of Abundance and Status of Humpbacks, and around the world.
Life history
Social structure
The humpback social structure is loose-knit. Typically, individuals live alone or in small, transient groups that disband after a few hours. These whales are not excessively social in most cases. Groups may stay together a little longer in summer to forage and feed cooperatively. Longer-term relationships between pairs or small groups, lasting months or even years, have rarely been observed. Some females possibly retain bonds created via cooperative feeding for a lifetime. The humpback's range overlaps considerably with other whale and dolphin species—for instance, the minke whale. However, humpbacks rarely interact socially with them, though one individual was observed playing with a bottlenose dolphin in Hawaiian waters.[17]
Courtship and reproduction
Courtship rituals take place during the winter months, following migration toward the equator from summer feeding grounds closer to the poles. Competition is usually fierce, and unrelated males, dubbed escorts by researcher Louis Herman, frequently trail females, as well as mother-calf dyads. Male gather into "competitive groups" and fight for females.[18] Group size ebbs and flows as unsuccessful males retreat and others arrive to try their luck. Behaviors include breaching, spyhopping, lob-tailing, tail-slapping, fin-slapping, peduncle throws, charging and parrying. Whale songs are assumed to have an important role in mate selection; however, they may also be used between males to establish dominance.[19]
Females typically breed every two or three years. The gestation period is 11.5 months, yet some individuals have been known to breed in two consecutive years. The peak months for birth are January, February, July, and August, with usually a one- to two–year period between humpback births. They can live up to 48 years. Recent research on humpback mitochondrial DNA reveals groups living in proximity to each other may represent distinct breeding pools.[20]
Song
Both male and female humpback whales vocalize, but only males produce the long, loud, complex "songs" for which the species is famous. Each song consists of several sounds in a low register, varying in amplitude and frequency, and typically lasting from 10 to 20 minutes.[21] Humpbacks may sing continuously for more than 24 hours. Cetaceans have no vocal cords, so whales generate their songs by forcing air through their massive nasal cavities.
Whales within a large area sing the same song. All North Atlantic humpbacks sing the same song, and those of the North Pacific sing a different song. Each population's song changes slowly over a period of years without repeating.[21]
Scientists are unsure of the purpose of whale songs. Only males sing, suggesting one purpose is to attract females. However, many of the whales observed to approach a singer are other males, often resulting in conflict. Singing may, therefore, be a challenge to other males.[22] Some scientists have hypothesized the song may serve an echolocative function.[23] During the feeding season, humpbacks make altogether different vocalizations for herding fish into their bubble nets.[24]
Humpback whales have also been found to make a range of other social sounds to communicate, such as "grunts", "groans", "thwops", "snorts" and "barks"
Ecology
Feeding and predation
Humpbacks feed primarily in summer and live off fat reserves during winter.[26] They feed only rarely and opportunistically in their wintering waters. The humpback is an energetic hunter, taking krill and small schooling fish such as Atlantic herring, Atlantic salmon, capelin, and American sand lance, as well as Atlantic mackerel, pollock, and haddock in the North Atlantic.[27][28][29] Krill and copepods have been recorded as prey species in Australian and Antarctic waters.[30] Humpbacks hunt by direct attack or by stunning prey by hitting the water with pectoral fins or flukes.
The humpback has the most diverse feeding repertoire of all baleen whales.[31] Its most inventive technique is known as bubble net feeding; a group of whales swims in a shrinking circle blowing bubbles below a school of prey. The shrinking ring of bubbles encircles the school and confines it in an ever-smaller cylinder. This ring can begin at up to 30 metres (98 ft) in diameter and involve the cooperation of a dozen animals. Using a crittercam attached to a whale's back, some whales were found to blow the bubbles, some dive deeper to drive fish toward the surface, and others herd prey into the net by vocalizing.[32] The whales then suddenly swim upward through the "net", mouths agape, swallowing thousands of fish in one gulp. Plated grooves in the whale's mouth allow the creature to easily drain all the water initially taken in.
Given scarring records, killer whales are thought to prey upon juvenile humpbacks, though this has never been witnessed. The result of these attacks is generally nothing more serious than some scarring of the skin, but young calves likely are sometimes killed.[33]
Range and habitat
Humpbacks inhabit all major oceans, in a wide band running from the Antarctic ice edge to 77° N latitude, though not in the eastern Mediterranean or the Baltic Sea.They are migratory, spending summers in cooler, high-latitude waters and mating and calving in tropical and subtropical waters.[21] An exception to this rule is a population in the Arabian Sea, which remains in these tropical waters year-round.[21] Annual migrations of up to 25,000 kilometres (16,000 mi) are typical, making it one of the mammals' best-traveled species.
A large population spreads across the Hawaiian Islands every winter, ranging from the island of Hawaii in the south to Kure Atoll in the north.[34] A 2007 study identified seven individuals wintering off the Pacific coast of Costa Rica as having traveled from the Antarctic—around 8,300 kilometres (5,200 mi). Identified by their unique tail patterns, these animals made the longest documented mammalian migration.[35] In Australia, two main migratory populations have been identified, off the west and east coasts, respectively. These two populations are distinct, with only a few females in each generation crossing between the two groups.[36]
Whaling
Humpback whales were hunted as early as the 18th century, but distinguished by whalers as early as the first decades of the 17th century. By the 19th century, many nations (the United States in particular), were hunting the animal heavily in the Atlantic Ocean, and to a lesser extent in the Indian and Pacific Oceans. The late-19th-century introduction of the explosive harpoon, though, allowed whalers to accelerate their take. This, along with hunting in the Antarctic Ocean beginning in 1904, sharply reduced whale populations. During the 20th century, over 200,000 humpbacks were estimated to have been taken, reducing the global population by over 90%, with North Atlantic populations estimated to have dropped to as low as 700 individuals.[37] In 1946, the International Whaling Commission was founded to oversee the whaling industry. They imposed rules and regulations for hunting whales and set open and closed hunting seasons. To prevent extinction, the International Whaling Commission banned commercial humpback whaling in 1966. By then, the population had been reduced to around 5,000.[38] That ban is still in force.
Prior to commercial whaling, populations could have reached 125,000. North Pacific kills alone are estimated at 28,000.[8] The full toll is much higher. It is now known that the Soviet Union was deliberately under-recording its catches; the Soviet catch was reported at 2,820, whereas the true number is now believed to be over 48,000.[39]
As of 2004, hunting of humpback whales was restricted to a few animals each year off the Caribbean island Bequia in the nation of St. Vincent and the Grenadines.[31] The take is not believed to threaten the local population. Japan had planned to kill 50 humpbacks in the 2007/08 season under its JARPA II research program, starting in November 2007. The announcement sparked global protests.[40] After a visit to Tokyo by the chairman of the IWC, asking the Japanese for their co-operation in sorting out the differences between pro- and antiwhaling nations on the Commission, the Japanese whaling fleet agreed no humpback whales would be caught for the two years it would take for the IWC to reach a formal agreement.[41]
In 2010, the International Whaling Commission authorized Greenland's native population to hunt a few humpback whales for the next three years.[42]
Conservation
The worldwide population is at least 80,000 humpback whales, with 18,000-20,000 in the North Pacific,[43] about 12,000 in the North Atlantic,[44] and over 50,000 in the Southern Hemisphere,[45] down from a prewhaling population of 125,000.[8]
This species is considered "least concern" from a conservation standpoint, as of 2008. This is an improvement from vulnerable in 1996 and endangered as recently as 1988. Most monitored stocks of humpback whales have rebounded well since the end of commercial whaling,[2][46] such as the North Atlantic, where stocks are now believed to be approaching levels similar to those before hunting began. However, the species is considered endangered in some countries, including the United States.[47][48] The United States initiated a status review of the species on August 12, 2009, and is seeking public comment on potential changes to the species listing under the Endangered Species Act.[49] Areas where population data are limited and the species may be at higher risk include the Arabian Sea, the western North Pacific Ocean, the west coast of Africa and parts of Oceania.[2]
Today, individuals are vulnerable to collisions with ships, entanglement in fishing gear, and noise pollution.[2] Like other cetaceans, humpbacks can be injured by excessive noise. In the 19th century, two humpback whales were found dead near sites of repeated oceanic sub-bottom blasting, with traumatic injuries and fractures in the ears.[50]
Once hunted to the brink of extinction, the humpback has made a dramatic comeback in the North Pacific. A 2008 study estimated the humpback population, which hit a low of 1,500 whales before hunting was banned worldwide, has made a comeback to a population of between 18,000 and 20,000.[51] Saxitoxin, a paralytic shellfish poisoning from contaminated mackerel has been implicated in humpback whale deaths.[52]
The United Kingdom, among other countries, designated the humpback as a priority species under the national Biodiversity Action Plan. The sanctuary provided by US National Parks, such as Glacier Bay National Park and Preserve and Cape Hatteras National Seashore, among others, have also become major factors in sustaining populations.[53]
Although much was learned about humpbacks from whaling, migratory patterns and social interactions were not well understood until two studies by R. Chittleborough and W. H. Dawbin in the 1960s.[54] Roger Payne and Scott McVay made further studies of the species in 1971.[55] Their analysis of whale songs led to worldwide media interest and convinced the public that whales were highly intelligent, aiding the antiwhaling advocates.
In August 2008, the IUCN changed humpback's status from Vulnerable to Least Concern, although two subpopulations remain endangered.[56] The United States is considering listing separate humpback populations, so smaller groups, such as North Pacific humpbacks, which are estimated to number 18,000-20,000 animals, might be delisted. This is made difficult by humpback's extraordinary migrations, which can extend the 5,157 miles (8,299 km) from Antarctica to Costa Rica.[20]
Whale-watching
Humpback whales are generally curious about objects in their environments. Some individuals, referred to as "friendlies", approach whale-watching boats closely, often staying under or near the boat for many minutes. Because humpbacks are often easily approachable, curious, easily identifiable as individuals, and display many behaviors, they have become the mainstay of whale-watching tourism in many locations around the world. Hawaii has used the concept of "ecotourism" to use the species without killing them. This whale-watching business brings in a revenue of $20 million per year for the state's economy
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