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There are at least 100 billion galaxies in the observable universe. And there are nearly 500 billion planets in the Milky Way alone, at least 10 billion of which are Earth-like. We see all of these planets, and yet we have yet to discover any alien life forms. What if we did? What if NASA suddenly announced that it had found microbes in the oceans of Europa? Or ancient alien ruins on Venus? What would that mean for human civilization here on Earth? Would we consider that good news? 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