ELI5: Explain Like I'm 5

Convergent evolution

Convergent evolution is when different species develop similar body parts even though they are not related. It is like if two kids in different parts of the world had a contest to draw the best dog. Even though they have never seen each other, they draw the same kind of dog because a dog has certain features that all dogs have. Convergent evolution works the same way - different species end up with the same features because of the environment they live in and the way they move and hunt for food.