Bryan and Cherry Alexander / Line of Emperor penguins (Aptenodytes forsteri) walking past an iceberg that has just broken off the ice of Snow Hill Island. Weddell Sea, Antarctica, October.
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Bryan and Cherry Alexander / Kangerdlugssuaq glacier, where two glaciers from the Greenland icecap join and flow to the sea. Northwest Greenland, 1991.
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Bryan and Cherry Alexander / Straight Line Leads in the Polar pack ice. Arctic Ocean, 1998.
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Bryan and Cherry Alexander / Greely's hut ruin (1883) on land between lake and bay. Pim Island, Ellesmere Island, Nunavut, Canada.
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Tim Laman / Aerial view of Golfito Bay with mangrove forest, Puntarenas, Costa Rica.
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Juergen Freund / Broken icefields in St. Lawrence Stream, Magdelan Islands, Canada
