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Neil deGrasse Tyson @neiltyson
More Cosmic Mysteries 1. What existed of our Universe before the Big Bang? 2. Do we live in a computer Simulation programmed by Aliens for their own amusement? 3. If dogs detect subtle smells from far away, what compels them to sniff each other’s butt at a fraction of an inch? https://t.co/qZms8io7MV — PolitiTweet.org