Stefan Christmann / Emperor penguin (Aptenodytes forsteri) preparing to jump over crack in sea ice. Atka Bay, Antarctica. August.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) walking across crack in sea ice during return to breeding colony. Atka Bay, Antarctica. April.
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Frederique Olivier / Group of Adelie penguins (Pygoscelis adeliae) swimming in a tide crack, lots jump out, Adelie Land, Antarctica, January.
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Ingo Arndt / Crack in ice floe in front of icebreaker ship Polarstern. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was driftin...
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Alex Hyde / Fairy's thimble flower (Campanula cochleariifolia) growing in a crack running through a limestone slab. Triglav National Park, Julian Alps, Slovenia. July.
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Olga Kamenskaya / Ice fragment on crack in Lake Baikal ice, Siberia, Russia, March.
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Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon
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Cyril Ruoso / Chimpanzee (Pan troglodytes) using tools to crack nuts, Gabon
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Anup Shah / Western chimpanzee (Pan troglodytes verus) juvenile female 'Joya' aged 6 years using rocks as tools to crack open palm oil nuts, Bossou Forest, Mont Nimba, Guinea. December 2010.
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Eric Baccega / Young Inuit boy jumping over a crack on ice floe, Ellesmere Island, Nanavut, Canada, June 2012. Model released.
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Grzegorz Lesniewski / Riparian forest with Crack Willow (Salix fragilis), White Willow (Salix alba) and blooming Wild Cherry (Prunus avium). Bieszczady Mountains, the Carpathians, Poland, May.
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Anup Shah / Bonobo (Pan paniscus) male using a rock to crack open nuts, tool use, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.
