Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles. (Aired February 5, 2020)

Official Website: https://to.pbs.org/3EUn0KC | #novapbs

In this two-hour special, renowned paleontologist Kirk Johnson takes us on an epic adventure through time at the polar extremes of our planet. Following a trail of strange fossils found in all the wrong places—beech trees in Antarctica, hippo-like mammals in the Arctic—Johnson uncovers the bizarre history of the poles, from miles-high ice sheets to warm polar forests teeming with life. What caused such dramatic changes at the ends of the Earth? And what can the past reveal about our planet’s climate today—and in the future?

Chapters
00:00:00 Introduction
00:05:49 Hunting for Fossils on Islands near the North and South Poles
00:22:52 Fossil of New Dinosaur Species Found in Patagonia
00:29:04 Was Death Valley Always the Hottest Place on the Planet?
00:37:32 How Have Carbon Dioxide Levels Changed on Earth Over Time?
00:49:18 How Do Ice Sheets Form in Antarctica
00:56:47 How Did Life Persist Through the Ice Age?
01:11:29 Impacts of Rising Temperatures on Ice Cycles of the Planet
01:31:30 What Was the Warm World Like Before the Ice Age
01:43:04 This Cave Has Been Frozen for 100,000 Years
01:50:30 Conclusion

© 2020 WGBH Educational Foundation

All rights reserved

This program was produced by GBH, which is solely responsible for its content.

This program is made possible by viewers like you. Support your local PBS station here: https://pbs.org/donate/

Enjoy full episodes of your favorite PBS shows anytime, anywhere with the free PBS App: https://to.pbs.org/2QbtzhR

Stay up to date on the latest science discoveries, full episodes, articles, videos, and more by signing up for NOVA's newsletter here: https://www.pbs.org/wgbh/nova/newslet...

FOLLOW US:

NOVA
YouTube:    / novaonline  
Facebook:   / novapbs   ​
Twitter:   / novapbs   ​
Instagram:   / novapbs  
TikTok:   / novapbs  

PBS
Facebook:   / pbs  
Twitter:   / pbs  
Instagram:   / pbs  
YouTube:    / pbs  
TikTok:   / pbs  

Shop: https://shop.pbs.org/

#paleontology #paleontologist #antarctica #antarctic #northpole #southpole #iceage #arctic #dinosaur #dinosaurs #deathvalley #deathvalleynationalpark

Where is the north pole, north pole temperature, ellesmere island, is antarctica the south pole, new dinosaur discovered, new dinosaur documentary, patagonia chile, what is the carbon cycle, death valley weather, death valley temperatures, snowball earth, ice sheet, drake passage