"This is what starvation looks like," wrote one of the photographers, Paul Nicklen. "The muscles atrophy. No energy. It's a slow, painful death." Mr Nicklen's colleague, Cristina Mittermeier ...

This story appears in the February 2014 issue of National Geographic magazine. Photographer Paul Nicklen waded into the frigid water of a river in the Canadian Yukon and set up a camera with a ...

This time of year is imperative for bears' health, as they must build fat stores to survive hibernation during frigid northern-Canadian winters. Thankfully, these majestic bears are protected in this ...