Originally Posted by moeloubani

You really have no idea about any of this stuff do you?

Your DNA doesn't mutate after you're born, your DNA is the same when you're born and when you die.

Adaptation isn't passed on to your kids. The way it works is if there are 100 men and 50 of them aren't hairy enough and don't have fast enough metabolisms then those 50 die and don't have children. The result is children that are hairy not because their parents adapted and passed that on to them but because of natural selection only the ones who could handle their environment survived.

Over thousands and hundreds of thousands of years, different traits are selected for and passed onto future generations. The ones that don't possess those traits tend to die and the ones that do tend to live. That's how it works.

Take your hypothetical hairy man - if the man's metabolism sped up and his hair grew thicker then those traits would have been passed onto his children regardless of if they came into use for him. But the point is he didn't change his DNA in a way to make his body produce more hair - that was part of him when he was born.

When DNA mutates it's because of something like radiation. Every time your cells multiply they make a copy of the DNA and sometimes radiation and things like bad copies happen where one or two things is out of place. Sometimes that leads to things like cancer.

Everyone in the world doesn't look the same because people are a product of two other people.

Adaptation doesn't happen in a single generation.

http://en.wikipedia.org/wiki/Evolution