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Have Aliens Visited Earth? | StarTalk 101 with Neil deGrasse Tyson

Is the government covering up aliens? What even is a UAP? We take a look back at Neil deGrasse Tyson breaking down claims of aliens, whether they’re here, and if they are anywhere with various guests including SETI Institute senior astronomer Seth Shostak, investigator Ben Radford, and astronomer Jill Tarter. Is it aliens? We discuss what makes us think the aliens built the pyramids and other conspiracies. Why would the government want to cover up aliens? What would happen if they were really here? Learn about how much of the galaxy we have actually searched for life and how there’s so much more to discover. What would actually happen when we find aliens? Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF Support us on Patreon:   / startalkradio   FOLLOW or SUBSCRIBE to StarTalk: Twitter:   / startalkradio   Facebook:   / startalk   Instagram:   / startalk   About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #neildegrassetyson 00:00 - What is a UAP? 2:52 - A Scientist’s Perspective 6:07 - Can We Trust Human Senses? 12:35 - Why Would the Government Cover Aliens Up? 15:40 - Searching for Life