Board Thread:The Flash discussions/@comment-9346948-20160323000422/@comment-28835160-20160323210931

Jon Jeong wrote: Wildesheer9876 wrote: Jon Jeong wrote: So how bout that blood type "PG-13" was it? I think it was C something I don't really know. Honestly I'm trying to understand how a whole new blood type can exist on an alternate earth. I would think the human body would be about the same on every earth.

Like in crisis on two earths when everyone's heart was on the right side.

It's been a long time since I've read Crisis on Two Earths so I totally forgot about that detail, but I find that very strange and disturbing for some reason.