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Celebrating 125 years of epic photography

By: Catie Leary on Sept. 28, 2013, 9:45 a.m.
Polar bear swimming underwater

Photo: Paul Nicklen/National Geographic

7 of 11

Canada, 2004

In yet another gorgeous shot by Paul Nicklen, a polar bear's image is mirrored in icy water as it travels submerged — a tactic often used to surprise prey.

Scientists fear global warming could drive bears to extinction sometime this century.