[PatrickHenry]

And that leaves me wondering what in our genetic "programming" supports such adaptation, e.g. to gravity?

I donno. Fish don't worry all that much about falling. It's only us land-dwellers that need to be concerned. My immediate response is that if any such creatures were oblivious to falling, they might not survive all that well. We're the descendents of those who got it right.

[Alamo-Girl]

My immediate response is that if any such creatures were oblivious to falling, they might not survive all that well. We're the descendents of those who got it right.

LOLOLOL! I have mental pictures of ancestral Wiley Coyotes walking off the edge of cliffs.