ADVANCED alien civilisations might not be very difficult to spot, according to a top Harvard professor, who provides advice on the key things to look out for.
Wednesday, 27 February 2019
UFO PROOF? Alien societies can be found with THIS easy method, claims Harvard professor
ADVANCED alien civilisations might not be very difficult to spot, according to a top Harvard professor, who provides advice on the key things to look out for.
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