How did teeth evolve? - Peter S. Ungar?

Teeth have changed over time, just like you've grown taller since you were little.

Long ago, animals had simple teeth, kind of like having only a few tools in your backpack. If you're eating leaves, you need teeth that can grind them up, like a crunchy snack. But if you're eating meat, you need teeth that can tear it apart, like ripping open a sandwich bag.

Peter S. Ungar studied how teeth changed over millions of years. He noticed that when animals ate different foods, their teeth changed too, just like how your mouth feels when you eat ice cream or hot soup.

Think about it: if you're eating tough plants all the time, your teeth get worn down more than if you’re eating soft fruits. So over time, animals with better tools (teeth) survived longer and had babies too.

Sometimes, a new kind of food came along, maybe a juicy berry or a big fish, and that changed what kinds of teeth worked best. It’s like when your favorite snack changes, you might need a different tool to eat it!

So teeth evolved because animals needed better ways to chew their food, just like you learn to use new tools as you grow up!