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 / Black striped capuchin (Sapajus libidinosus) using rocks to crack nuts, with young animal watching and learning, 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 / Black striped capuchin (Sapajus libidinosus) using rock 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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Floris van Breugel / A dark passageway of a narrow flooded slot canyon, Zion National Park, Utah, USA. November 2009.
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Neil Lucas / Glacier rising up out of sea ice with ice crack visible, Ross Sea, Antarctica, November 2008
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Neil Lucas / Glacier and sea ice, with crack in ice visible, McMurdo Sound, Ross Sea, Antarctica, November 2008
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Wild Wonders of Europe / Zupanc / (Paederota lutea) growing in crack in rock, Triglav National Park, Slovenia, July 2009
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Wild Wonders of Europe / Lilja / Endemic Rockcress (Arabis purpurea) flowers growing in rock crack, Paphos forest, Troodos mountains, Cyprus, April 2009
