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/newsletter/ FOLLOW US: NOVA YouTube: https://www.youtube.com/novaonline Facebook: https://www.facebook.com/NOVApbs Twitter: https://twitter.com/novapbs Instagram: https://www.instagram.com/novapbs/ TikTok: https://www.tiktok.com/@novapbs PBS Facebook: https://www.facebook.com/PBS/ Twitter: https://twitter.com/PBS/ Instagram: https://www.instagram.com/PBS/ YouTube: https://www.youtube.com/PBS/ TikTok: https://www.tiktok.com/@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
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