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66 million years ago, an asteroid as big as Mount Everest headed on a deadly collision course with Earth. The impact was so devastating that it wiped out the most gigantic and deadly reptiles that have ever roamed our planet. 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 E Se in French: http://bit.ly/Et-si-youtube E Se in Mandarin: http://bit.ly/YT-Chinese-what-if E Se in Hindi: http://bit.ly/what-if-hindi-youtube Podcast: http://bit.ly/yt-what-if-show-podcast What If is a documentary mini-series that takes you on an epic journey of hypothetical worlds and possibilities. He comes with us on an imaginary adventure through time, space and chance. We will do our best to explain complex topics in an entertaining way. Produced with love by Underknown in Toronto: https://underknown.com