This is like the chicken or the egg.

I'm coming to the conclusion that Mother Nature is a force to be reckoned with, more so than we even know - scientists and all.

If there's a body of water, eventually there's going to be fish in it.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."