[dkokelley]

Natural selection states that the most fit for survival will survive. When applied to evolution, it means that humans were better-suited for survival than t-rexes.

Think about it like this: A T-Rex has to eat a lot of food to survive. What happens when there is a shortage of food? The T-Rex can kill and eat just about anything, but it need s a lot of it to survive. Humans aren't as fit to kill things as T-Rexes, but they are smarter, and they don't need to eat as much, and they can survive on plants too. Humans could grow and store food, so they survived. Dinosaurs weren't smart enough to grow or store food, so they had to eat when they found food, or not eat. They didn't survive.

(Please, nobody 'correct' me by saying that a meteor killed the dinosaurs. For this example, it was their small brains.)

[gort]

"humans were better-suited for survival than t-rexes"

A bizarre statement, given that the two never existed at the same time.

Yes, it was indeed a meteor that killed almost all the dinosaurs (except a group of theropods that had evolved wings and survive to this day). Evidently the shrew-like mammals of the time were better suited to the post-impact environment. We evolved from them.

[dkokelley]

sigh

You didn't get my point. I intended to use food requirements and storage as an example to show how the more fit for survival are selected to reproduce.

I know that my example was an over-simplification. I was trying to meet the parent half-way so that he would understand.

[rv77ax]

so, every body know that meteor killed almost all the dinosaurs. but no body is telling me ? it's some kind of public secret or what ?

[gort]

Apparently.

The first major clue is the presence of iridium (a metal common in asteroids) at exactly the right place in the rocks (the Cretaceous-Tertiary or "KT" boundary, dating to 65 million years ago, which is also when non-avian dinosaurs went extinct). That was discovered around 1980 by Alvarez et al.

Further research has led us to the Chicxulub crater near the Yucatan Peninsula as the impact site.

Now you know.

[Lozzer]

Given that T-Rex survived for about 3 million years, and that Homo Sapien is up to 0.5 million I'd say the jury is sitll out.