How does natural selection help animals survive?
Nature's Patient Sieve
How does natural selection help animals survive?
Imagine a whole field of beetles, and not one of them is quite the same. Some are a little browner, some a little greener, some faster, some slower. That tiny bit of "everybody's different" is where one of nature's best tricks begins.
Here's the first rule: living things make more babies than the world has room for. Ten beetles can become a hundred, then a thousand. But there's only so much food, so much shelter, so much space. Not everyone can win.
