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NASA Scientist Answers Alien Questions | Tech Support | WIRED
Senior Scientist for Astrobiology Strategy at NASA David Dr. Grinspoon joins WIRED to answer the internet's burning questions about astrobiology. Where do astrobiologists work? What is the probability that humans aren't alone in the universe? Have there been credible UFO sightings documented? What REALLY goes on at Area 51? Was there ever life ...
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