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What If We Traveled One Billion Years Into the Past?

Sign up for the Great Courses Plus and get a 14-day FREE trial: https://thegreatcoursesplus.com/whatif You don’t want to pass this up, so go now! Imagine if you could take in all of human history in the blink of an eye. Well, from the first steps on the moon to the first steps out of the slime, that's exactly what we are in cosmic terms. But in that short amount of time, we have done quite a bit. If you could travel through time, you could witness the rise and fall of the many species that existed long before we were here. What would you see if you traveled one billion years into the past? Did Earth ever look like a giant slushball? How far back would you have to go to see the first humans? And, are we already going extinct? Would you need to go through a wormhole or perhaps travel faster than the speed of light? Watch as history unfolds in front of your eyes. Transcript and sources: https://whatifshow.com/what-if-we-tra... Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book Join this channel to get access to perks:    / @whatifscienceshow   Watch more what-if scenarios: Planet Earth: http://bit.ly/YT-what-if-Earth The Cosmos: http://bit.ly/YT-what-if-Cosmos Technology: http://bit.ly/YT-what-if-Technology Your Body: http://bit.ly/YT-what-if-Body Humanity: http://bit.ly/YT-what-if-Humanity T-shirts and merch: http://bit.ly/whatifstore Suggest an episode: http://bit.ly/suggest-whatif Newsletter: http://bit.ly/whatif-newsletter Feedback and inquiries: https://underknown.com/contact/ What If elsewhere: Instagram: http://bit.ly/whatif-instagram Twitter: http://bit.ly/whatif-twitter Facebook: http://bit.ly/facebook-whatif What If in Spanish: http://bit.ly/YT-Spanish-what-if What If in Mandarin: http://bit.ly/YT-Chinese-what-if Podcast: http://bit.ly/yt-what-if-show-podcast What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way. Produced with love by Underknown in Toronto: https://underknown.com #Whatif #timetravel #earth #holoceneextinction