By NPR Staff
Originally published on Sat February 2, 2013 5:41 pm
In 2008, reports of polar bears' inevitable march toward extinction gripped headlines. Stories of thinning Arctic ice and even polar bear cannibalism combined to make these predators into a powerful symbol in the debate about climate change.
The headlines caught Zac Unger's attention, and he decided to write a book about the bears.
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