NOVA: Polar Extremes

Renowned paleontologist Kirk Johnson takes us on an epic adventure through time at the polar extremes of our planet. Following a trail of fossils found in all the wrong places beech trees in Antarctica, redwoods and hippo like mammals in the Arctic NOVA uncovers the bizarre history of the poles, from miles-thick ice sheets to warm polar forests teeming with life. Producers: Laurie Cahalane, Melanie Wallace, David Dugan. Host: Kirk Johnson