ATOT biologists: why are there multiple blood types?

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zinfamous

No Lifer
Jul 12, 2006
111,857
31,346
146
we co-evolved with Vampires.

Different blood types keeps the vampires confused.

<--ATOT Biologist.
 

blankslate

Diamond Member
Jun 16, 2008
8,797
572
126
So God could have a laugh when people first tried blood transfusions without knowing about blood types...

I don't want to spread any scandalous rumors, but I I think that god has got a sick sense of humor...
 

Taja

Junior Member
Aug 8, 2013
22
0
0
It could of just been one of those really mistakes. It might've happened for no apparent reason, it wouldnt be the first time (look at the platypus). Or, like one of the original posts said it probably has a lot to do with helping us with parasites and the like. All I know is if a positive is pregnant with a negative (or vice versa) sometimes the woman's body with fight off the baby.