There have been faster cheetahs and slower cheetahs.
Slower cheetahs starved to death.
There have been faster gazelles and slower gazelles.
Slower gazelles get eaten by faster cheetahs.
Faster gazelles and faster cheetahs survive to breed.
So, what happens when all the slow gazelles have been eaten?
Fewer, but very hungry cheetahs subsisting on whatever is slower than they are.
More, fat, sassy gazelles, including slow ones that wouldn't have survived before.
Guess what happens next?
Oh, and Texas Eagle, if you'll please move to the front of the room maybe you'll hear the lessons.
placemarker