What is Biological evolution?

Biological evolution is when creatures change over time to better fit where they live.

Imagine you have a box full of different kinds of toys, some are bouncy balls, some are blocks, and some are tiny cars. Now, every year, you pick the toy that plays the best game with you and make more like it. Over many years, all the toys in your box will start to look more like that one favorite toy.

That’s kind of how evolution works! Creatures have babies, just like people do. Sometimes a baby is born with a little different feature, maybe it has longer legs or a bigger nose. If that helps it survive better, like finding food or avoiding danger, then those special features might be passed on to its babies too.

Think about dogs! All dogs come from the same ancestor, a kind of wolf. But now we have tiny Chihuahuas and big, strong Great Danes. That’s because people picked certain dogs to breed more often, like how you might pick your favorite toy to make more copies.

So over time, creatures become different from their ancestors, just like your box of toys changed from a mix into mostly one kind of toy.