That Time Neil deGrasse Tyson Made Us Question Everything-(Re-posted from ScienceNET)
Once again listen to another master piece from Tyson where he talks about aliens and considers the idea of extraterrestrials already living among us in secret.
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Bala Prasad says:Something fundamental to be human -
thequestforum says:
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Chander Mohan says: -
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Bala Prasad says:
