Podcast: Ancient Polar Bears, a Mitochondrial Medical Mystery, and More

David is the Online News Editor of Science.

Where do polar bears come from? Why does the body sometimes attack its own mitochondria? And what really killed the golden toad? ScienceNOW Editor David Grimm chats about these stories and more with Science podcast host Robert Frederick.

Listen to the ScienceNOW podcast.

(or listen to the full Science podcast.)

podcast