Streams

On Thin Ice

Monday, February 15, 2010

Science writer Richard Ellis talks about how the polar bear has become a symbol of how climate change threatens life on the planet. In On Thin Ice: The Changing World of the Polar Bear, he looks at why the world population of polar bears has shrunk by half in the last 20 years.

Guests:

Richard Ellis
News, weather, Radiolab, Brian Lehrer and more.
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