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Fifty Million Years Ago, the Arctic Was a Warm Swamp I NOVA I PBS

NOVA PBS Official | January 5, 2026



Think you know what the Arctic was like during the Eocene Epoch? Imagine standing in water up to your knees and being surrounded by towering dawn redwood trees. The climate was warm and humid. And in winter, the period of daylight shortened so that it was dark nearly all the timeβ€”just as it does todayβ€”but the temperature never got really cold.

Play NOVA’s Polar Lab to find out more. (You might be surprised by the plants and animals that used to call the Arctic home.): https://www.pbs.org/wgbh/nova/labs/lab/polar/

Hosted by: Caitlin Saks
Production by: Ari Daniel & Lorena Lyon
Camera: Emily Zendt
NOVA Labs Editorial Director: David Condon

Additional Visuals: NMNH I Smithsonian, Videoblocks
Music: APM

Β© WGBH Educational Foundation 2020

Written by NOVA PBS Official

Comments

This post currently has 23 comments.

  1. @The_Conspiracy_Analyst

    January 5, 2026 at 3:21 am

    Yes the global mean temperature was 14 degrees warmer that it is now. But yet the whole Earth was a flourishing environment filled with life. Kinda blows the doors off the "global warming will turn the entire Earth into the Sahara" alarmist narrative!

  2. @AudioPervert1

    January 5, 2026 at 3:21 am

    fake snowfall looping on a frame with acoustic muzak in the background.. this is neoliberal science – never of any real use and always stuck in speculation or simulation. Pfffft so boring

  3. @ninersix2790

    January 5, 2026 at 3:21 am

    Hey, so the earth was warm all over the globe…, (hmmmmm) with no humans anywhere on the planet! Wow; so the earth goes through "CLIMATE CHANGE" with out humans? Not to mention there was more "CARBON" everywhere (carbon dioxide gas) with no human intervention at all. Not only that the Earth has gone from warm to Ice Age several times in Earths history with no human intervention/interference because nobody was there. Their is a cave in the far north that proved that 400,000years ago the earth was warmer, much warmer than it is today, I know I watched it on YouTube yesterday. All of you climate change people are just plain wrong. Just because it gets warmer or colder has nothing to do with us puny humans.

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