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We're a group of lizards that live in the desert! We are green and very noticeable
I'm a desert snake. I eat these lizards! Remember this for later
Hey! I'm the same as you guys, except one of my genes mutated so I'm brown and can camouflage in the desert
Forget about that and worry about the snake! We're easy to spot and we get eaten first
Hey. That's weird. That lizard looks different
Now we are mostly brown lizards!
I survived to reproduce with other lizards!
We spread the gene for brown scales to camouflage and were eaten less
Most of us green lizards were eaten in a stunning example of natural selection