S47 E1: Polar Extremes Preview

Airing: 2/5/2020 | 0:03:19 | Promotion
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.

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