Polar Extremes Preview
Preview: Season 47 Episode 1 | 3m 19s Video has closed captioning.
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.
Problems Playing Video? | Closed Captioning