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Have fun guys but play safe !
This Aids ribon was given to me by Mikey over 12 years ago so i want to share it with you on World Aids day warm Hugs x
What is this? The surface of a newly discovered alien world? If we encountered extra-terrestrial life, would we even recognise it? SETI? 👽
World Market Center in Las Vegas, Nevada, is a furniture showroom complex in downtown Las Vegas serving domestic and international sellers and buyers. It contains 5.3 million square feet across four buildings, part of a 57-acre site. The project was proposed in 2001, and the first building opened on July 25, 2005. The WMC was designed by the late architect Jon Adams Jerde.
Looking close... on Friday! theme : #Flora on White Background
Flowers are like friends;
they bring color to your world.
Thank you everyone for your visits, faves, and kind comments
Beautiful world
Temperature just around zero degrees Celcius.
Hair ice (also known as ice wool or frost beard) is a type of ice that forms on dead wood and takes the shape of fine, silky hair. It is somewhat uncommon, and has been reported mostly at latitudes between 45 and 55°N in broadleaf forests. The meteorologist and discoverer of continental drift, Alfred Wegener, described hair ice on wet dead wood in 1918, assuming some specific fungi as the catalyst, a theory mostly confirmed by Gerhart Wagner and Christian Mätzler in 2005. In 2015, the fungus Exidiopsis effusa was identified as key to the formation of hair ice.
Formation
Hair ice forms on moist, rotting wood from broadleaf trees when temperatures are slightly under 0 °C (32 °F) and the air is humid. Each of the smooth, silky hairs has a diameter of about 0.02 mm and a length of up to 20 centimetres (7.9 in). The hairs are brittle, but take the shape of curls and waves. They can maintain their shape for hours and sometimes days. This long lifetime indicates that something is preventing the small ice crystals from recrystallizing into larger ones, since recrystallization normally occurs very quickly at temperatures near 0 °C.
The hairs appear to root at the mouth of wood rays (never on the bark), and their thickness is similar to the diameter of the wood ray channels. A piece of wood that produces hair ice once may continue to produce it over several years.
In 2015, German and Swiss scientists identified the fungus Exidiopsis effusa as key to the formation of hair ice. The fungus was found on every hair ice sample examined by the researchers, and disabling the fungus with fungicide or hot water prevented hair ice formation.[1] The fungus shapes the ice into fine hairs through an uncertain mechanism and likely stabilizes it by providing a recrystallization inhibitor similar to antifreeze proteins.
Source: en.wikipedia.org/wiki/Hair_ice
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Cheveux de glace
Les cheveux de glace, ou chevelure de glace, sont le phénomène d'apparition de glace sous forme de filaments très fins, par temps de gel, à partir de morceaux de bois mort ou d'autre végétaux. Le phénomène est comparable mais distinct des pipkrakes, issues du sol et plus grossières. Les cheveux de glace sont différents du givre par leur apparence comme par leur formation.
Formation
La formation des cheveux de glace se produit dans des conditions météorologiques particulières : par gel modéré et lorsque le sol, très humide, n'est pas encore gelé. Le phénomène est rare et s'observe plutôt dans les sites ombragés et tôt le matin.
Les cheveux de glace apparaissent sur des végétaux particuliers, comme le bois mort de hêtre ou de chêne. Leur observation donne à penser que l'eau contenue dans le bois est expulsée à travers les pores du bois par son expansion à l'approche du point de congélation, et gèle sous forme de fils très fin au contact de l'air. Le mécanisme pourrait néanmoins être plus complexe et être lié à la présence de champignons sur ces bois en décomposition; en 2015, le champignon Exidiopsis effusa (en) a été identifié comme essentiel à ce mécanisme. La poussée de ces fils de glace peut avoir une force suffisante pour repousser l'écorce d'un bois mort. La formation est très fragile, elle se détruit au toucher ou au souffle et disparait naturellement par fonte ou sublimation si elle est exposée au soleil.
Historique
En 1918 Alfred Wegener évoque que le mycélium sur le bois en décomposition contribue au phénomène. En 2014, Christian Mäztler, physicien de l’université de Berne associé à Diana Hofmann, chimiste et Gisela Preuss, biologiste ont élucidé le mystère de leur formation.
Source: fr.wikipedia.org/wiki/Cheveux_de_glace
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Haareis, manchmal auch Eiswolle genannt, besteht aus feinen Eisnadeln, die sich bei geeigneten Bedingungen auf morschem und feuchtem Totholz bilden können. Anders als Hydrometeore (zum Beispiel Raureifkristalle) entsteht Haareis aus dem im Holz enthaltenen Wasser, nicht aus Luftfeuchtigkeit.
Ähnlich aussehende und häufig nicht genau unterschiedene Phänomene sind Bandeis (engl. ice ribbons, ice flowers) an Pflanzenstängeln und Kammeis (engl. needle ice) am Boden, die beide jedoch anders gebildet werden.
Entstehung
Wissenschaftlich ist die Entstehung des nur selten zu beobachtenden Haareises noch wenig erforscht. 1918 beschrieb der Meteorologe Alfred Wegener Haareis auf nassem Totholz. Er vermutete einen „schimmelartigen Pilz“ als Auslöser, was jedoch von anderen Wissenschaftlern angezweifelt wurde, die rein physikalische Prozesse wie bei der Entstehung von Kammeis als Ursache annahmen.
Eine biophysikalische Studie von Gerhart Wagner und Christian Mätzler bestätigte 2008 Wegeners Vermutung weitgehend. Demnach wird Haareis durch das Myzel winteraktiver Pilze (u. a. Schlauch- und Ständerpilze) ausgelöst, deren aerober Stoffwechsel (Dissimilation) Gase produziert, die das im Holz vorhandene leicht unterkühlte Wasser an die Oberfläche verdrängen. Dort gefriert es und wird durch nachdrängende, beim Austritt aus dem Holz ebenfalls gefrierende Flüssigkeit weitergeschoben. Dies geschieht ausschließlich bei Temperaturen knapp unter dem Gefrierpunkt, wenn das Wasser im Holz noch nicht gefroren ist, es an der geringfügig kälteren Umgebungsluft jedoch gefriert. Eine Randbedingung für die Haareisbildung ist außerdem hohe Luftfeuchtigkeit: Wenn die Luft nicht mit Wasserdampf gesättigt ist, sublimieren die feinen Eiskristalle kurz nach ihrer Bildung an der Holzoberfläche, so dass keine langen Haareiskristalle entstehen können. Eine Reproduktion von Haareis ist in Versuchen solange möglich, wie das Pilzmyzel im Holzkörper nicht abgetötet wird.
Quelle: de.wikipedia.org/wiki/Haareis
O wonder!
How many goodly creatures are there here!
How beauteous mankind is! O brave new world,
That has such people (squirrels like Liam) in't.
(Squirrels-2020-5655.jpg)
Serving you up some wishes of world peace. We can all do our part to make the world a better place. What are you doing on this Earth Day to make your corner of the world better? I will be working in my yard pulling weeds instead of spraying weed killer on them. Then later my daughter and I will plant some seeds and work together in the garden (crossing fingers that the rain won't come).
Science World at Telus World of Science, Vancouver est un musée scientifique sans but lucratif situé dans la ville de Vancouver, en Colombie-Britannique, au Canada. Situé au bout de False Creek, le musée présente plusieurs expositions permanentes ainsi que temporaires.
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Enfin, après quelques semaines de vide photographique j'ai pu reprendre en main mon 5D Mark II, ici sur le parvis de la Défense où les travaux de la fontaine sont finis. A peine mon trépied posé que la pluie commençait à tomber. J'ai bien fait d'attendre car 15min plus tard la surface de l'eau avait retrouvé son lissage.
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It's that simple... I wish you all a nice end of the year and of course a great start to the new year.
"Never stop dreaming and never stop fighting to build a better life for you and yours. And even if life hits you, don't let it take away your smile, or turn off the light of hope"
Have a happy new year to you and your loved ones!
So it is World Photography Week this week (8-12 through 8-26) so there is still plenty of time to make a few photos to celebrate!
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Une photo pas très récente , mais je n'avais pas eu l'occasion de la partager ici .
C'était une photo pour un concours sur un forum , j'avais choisi d'aborder le thème de l'enfance .
A picture not very recent, but I had not had the opportunity to share it here.
It was a photo for a contest on a forum, I chose to tackle the theme of childhood.
“This is a good world that has gone wrong,
but still retains the memory
of what it ought to have been.”
- C S Lewis
Usually when I see a new world sparrow with a yellow supercilium (eyebrow), it is a white-throated sparrow, the bird that whistles in the forrest a bit as if my father in law was trying to „call“ us during a hike or while mushroom hunting. This bird is different however - it has quite extensive streaking on its chest, which white-throated sparrows only have when they are young. But then white-throated juveniles do not have the yellow supercilium. Also the ear coverts are much more distinctly marked than on the white-throated. The bird in the picture is therefore a Savannah sparrow, found in Round Lake Preserve, upstate NY. This may not be the quality shot that I usually try to upload here, but I found the bird and the identification still worth sharing.
It's early morning and this leopard cub, its sibling, and their mother are out and about in their world, Houmoed, Auob riverbed, Kgalagadi Transfrontier Park, South Africa
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It is World Rhino Day – a day to celebrate the different species of rhino and raise awareness of the threats they face, from poaching to habitat loss. At the beginning of the 20th century, there were half a million rhinos across Africa and Asia but now there are around 29,000, although population numbers are slowly increasing again.
"The more often we see the things around us - even the beautiful and wonderful things - the more they become invisible to us. That is why we often take for granted the beauty of this world: the flowers, the trees, the birds, the clouds - even those we love. Because we see things so often, we see them less and less."
Joseph B. Wirthlin
Location: Berlin,Germany