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While humanity may not have to leave Earth during the time you’re living on the planet, we should start preparing as soon as possible. Not only could it take centuries to plan a relocation program, but it could also take generations to move to a potential new home. That right there is Proxima Centauri b, or just Proxima b. It’s the closest potentially habitable planet out there. Its temperatures are in the bearable range, and it could have just the right breathable atmosphere. We just need to get there. How long would our journey take? How many people would we send to successfully populate the new world? What if we discovered that Proxima b isn’t as habitable as we thought? What If in other places: What If in English: http://bit.ly/facebook-whatif What If in Spanish: http://bit.ly/YT-Spanish-what-if What If in Italian: http://bit.ly/Cosa-succederebbe-se What If in French: http://bit.ly/Et-si-youtube What If in Mandarin: http://bit.ly/YT-Chinese-what-if What If in Hindi: http://bit.ly/what-if-hindi-youtube Podcast: http://bit.ly/yt-what-if-show-podcast What If is a documentary miniseries that takes you on an epic journey of hypothetical worlds and possibilities. Come with us on an imaginary adventure through time, space and chance. We'll do our best to explain complex topics in a fun way. Produced with love by Underknown in Toronto: https://underknown.com