Ancient Aliens: Alien Blood Types (S11, E10) | History

15% of humans have a rare bloodtype known as Rh negative. See what experts have to say about a possible link to extraterrestrial modification of humans in this collection of scenes from "The Prototypes." #AncientAliens

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Ancient Aliens
Season 11
Episode 10
The Prototypes

"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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