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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David Woodfall / Aerial view of pancake ice sheet cracking and melting in Hudson Bay, Manitoba, Canada, December 2004
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Mary McDonald / Black striped capuchin (Sapajus libidinosus) using rocks to crack nuts, Piaui, Brazil
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Mary McDonald / Black striped capuchin (Sapajus libidinosus) using rocks to crack nuts, Piaui, Brazil
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Mary McDonald / Brown Capuchin (Cebus apella) using rocks to crack nuts, Piaui, Brazil
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Bryan and Cherry Alexander / Inuk cracking his whip to encourage Huskies (Canis familiaris) over the sea ice. Igloolik, Nunavut, Canada, 1993.
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TJ Rich / Blue iceberg with visible crack, Antarctica
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Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil
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Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil
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Mark Moffett / Large Ground Finch (Geospiza magnirostris) endemic species, extra large bill for cracking large seeds, largest of Darwin's 13 Finches, Santiago Island, Galapagos Islands, Ecuador
