Rh-negative blood

From Kook Science

Rh-negative blood refers to the blood group that lacks the protein Rh (Rhesus), and is typically linked to the ABO blood type (i.e. types A, B, O, AB are coupled with the Rh positive or negative, hence blood types like O Positive, A Positive, O Negative, &c.). This trait has been of certain interest among believers in ancient alien interactions with humanity, who have asserted it is evidence that humans have been modified by extraterrestrials.

As evidence of alien ancestry