Sven Zacek / Broken ice covered in snow at sunset, on the shore of Lake Vortsjarv, gathered to shore by extreme winds, Estonia. December 2014.

Olga Kamenskaya / Pyramidal ice fragment reflected on the surface of Lake Baikal. Ice fragment acting as a prism refracting light into rainbow. Siberia, Russia, March.

Olga Kamenskaya / Ice fragment reflected in the ice of Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Ice fragment reflected in the ice of Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Ice fragment on crack in Lake Baikal ice, Siberia, Russia, March.

Juan Carlos Munoz / Ice on water, Plitvice Lakes National Park, Lika, Croatia, Europe, January

Albert Lleal / SEM close-up view of a skeletal fragment of a Bryozoan colony at 35x magnification that came from a beach in Formentera, Balearic Islands, Spain

Albert Lleal / SEM close-up view of a skeletal fragment of a Bryozoan colony at 21x magnification, came from beach in Formentera, Balearic Islands, Spain

Albert Lleal / Electron microscope view of bryozoan colony fragment isolated from beach sand, Formentera, Balearic Islands, Spain

Solvin Zankl / Leafcutter ant {Atta sp} carrying leaf fragment to nest. Ants are champion weightlifters, capable of lifting 50 times their body weight (the equivalent of a human heaving 50 people). They would win a...

Stefan Christmann / Sea ice in summer thaw. Atka Bay, Antarctica. February 2017.

Ingo Arndt / Moving sea ice, Magdalen Islands, Gulf of St Lawrence, Quebec, Canada, March 2013.