Has anyone considered Noah's Ark in terms of what happened after all of the pairs of animals got off the Ark? There's only two of each species? Everything else is dead? How do you repopulate a world this way? Aren't the populations too small for sufficient genetic diversity?
Basically, after you get off the Ark, immediately it's down to business. And there's basically just one rule of thumb: inbreeding / incest. Basically you have two parents that diddle each other. After that you either have A) Parents diddling their children (eww!) or B) children diddling each other (double eww!). Either way, every species is committing massive incest & inbreeding.
Has nobody ever considered this? I mean, certainly, someone, somewhere...
But, it's all good, 'cause God gave us all a rainbow... And that makes everything okay! *Rolls eyes.*