Bubbles, created in winter by the photographer, rapidly form ice crystals on the inside surfaces, Michigan, USA,

Navajo Sandstone shaped like cauliflower, cracked into polygons, at White Pocket, Vermilion Cliffs National Monument, Arizona, USA

Saguaro

a small spillway of a lake

what it took: Finding the perfect flower to display pattern and then cropping that image to a square format to best showcase the flower's center.

Parents observe and analyze pill bugs during the interactive STEM keynote workshop conducted by Dr. Diana Wehrell-Grabowski.

Ice cave interior where stream melts snow under a snowfield, near Hogsback Camp below Heliotrope Ridge on the slopes of Mount Baker, Mount Baker-Snoqualmie National Forest, Washington State, USA

Wind-blasted snow clinging to hardwood trees after a winter storm in Mecosta County, Michigan, USA

Reflections on a Beaver pond of flooded trees, Woodland Park and Nature Preserve in Battle Creek, Michigan, USA

Bubbles, created in winter by the photographer, rapidly form ice crystals on the inside surfaces, Michigan, USA,

Incredible patterns of sand, including heavier black sand particles, on Rialto Beach in Olympic National Park, Washington State, USA

Gray Pine, Pinus sabiniana, needles close up in Pinnacles National Park, California, USA

Shaw's Agave, Agave shawii, in Cabrillo National Monument, San Diego, California, USA

[Iris sibirica] Also known as Fleur-de-Lis

It's amazing how this hardy, autumn plant resembles a snowflake.

Wind rippling the surface of Snow Lake along Snow Lake Trail leading into the Alpine Lakes Wilderness, Mt. Baker–Snoqualmie National Forest, Washington State, USA

Sea urchin test (shell) at Tongue Point in Salt Creek Recreation Area along the Strait of Juan de Fuca, Olympic Peninsula, Washington State, USA

Hamma Hamma Living Legacy Trail dedicated to the accomplishments of the CCC Boys during the Great Depression, Olympic National Forest, Washington State, USA,

Quaking Aspen, Populus tremuloides, forest of bare branches along beginning of Wheeler Peak Summit Trail in Great Basin National Park, Nevada, USA

Honeycomb Tube Worm, Phragmatopoma californica, colony adjacent to mussel bed exposed at low tide at Natural Bridges State Beach, Santa Cruz, California, USA

Honeycomb Tube Worm, Phragmatopoma californica, colony adjacent to mussel bed exposed at low tide at Natural Bridges State Beach, Santa Cruz, California, USA

Intricate boxwork in Wind Cave, a cave formation found here more than anywhere else, Wind Cave National Park, South Dakota, USA

Trees and shadows at sunset on a winter day in downtown Battle Creek, Michigan, USA

Patterns and lines in mudstone at low tide at Natural Bridges State Beach, Santa Cruz, California, USA

A candidate for 'Forms in Nature' challenge. Not sure about this one yet.

Parents analyze structure and function in objects from nature during interactive keynote STEM workshop for parents conducted by Dr. Diana Wehrell-Grabowski.

Wind has blown snow into rhythmic patterns on the frozen surface of a fjord in the Westfjords region of Iceland

Surging Pacific Ocean surf viewed from a high vantage point on East Anacapa Island, Channel Islands National Park, California, USA

Strybing. Sunlit.

eastern box turtle or wood turtle?

Quaking Aspen, Populus tremuloides, forest of bare branches along beginning of Wheeler Peak Summit Trail in Great Basin National Park, Nevada, USA

Annual Garden Tour in Wallingford district of Seattle, WA

Seattle, Rose Garden

Parents analyze structure and function in objects from nature during interactive keynote STEM workshop for parents conducted by Dr. Diana Wehrell-Grabowski.

Closeup of spectacular frosty ice formations of Eben Ice Caves, Rock River Canyon Wilderness, Hiawatha National Forest, Michigan, USA

Black Oak leaf and ice on a vernal pond in Woodland Park and Nature Preserve in Battle Creek, Michigan, USA

Summer snow field pocked with sun cups in July, Skyline Trail above Paradise in Mount Rainier National Park, Washington State, USA