RH- blood and our alien DNA

I listened to a show on MITD last week. The scientist talked about this topic and gave a reason for it. I’ll gave to look it up. It wasn’t alien
Ok found it, Oct 17,2018 Tracy Savage talks the mystery of RH blood. I’m sure if someone is interested and not a member you could google her.
 
it's not just the rh factor incompatibility, the blood types also have antigens too. I think it is evolutionary rather than alien

I agree. By the logic presented, if we evolved from a common ancestor, we should all look alike, too. That's not how gene mutation and expression work, though. You don't even have to look that far back. The average male height comes to mind.