Why Scientists Think Aliens Have ALREADY Visited Earth

In this video, WatchMojo takes a closer look at the theory that alien life may have ALREADY visited Earth.

Aliens on our planet?? With the likes of Avi Loeb pushing against the mainstream, is it time for science to take a different strategy when searching for extraterrestrials? Should we actually be looking much closer to home??

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Find more amazing videos for your curiosity here:
Introducing the Time Travel APOCALYPSE – https://youtu.be/FTgc1CLBCrk?
Do You Enter a NEW DIMENSION When You Die? – https://youtu.be/GXqwgy-9U-E?

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