Arizona PBS Previews

NOVA : 4701

Preview | 30s

"Polar Extremes" - Following a trail of fossils found in all the wrong places -- beech trees in Antarctica, redwoods and hippo-like mammals in the Arctic -- uncover the bizarre history of the poles, from miles-thick ice sheets to warm polar forests teeming with life.

Aired: 02/05/20

Rating: NR

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