Dr. Yara Haridi

You got to eat well.

That selection pressure is probably lifted for us.

One, because we're social animals.

We feed each other, you know, we make mushy food for like,

elders who do not have teeth anymore, there's ways that we adapt beyond needing perfect occlusion.

The other thought is that we've through evolutionary time have softened our diets and having a really hard diet helps you grow your jaw bigger.

And so like basically your jaw grows properly, has enough space and your teeth are not overcrowded.

You know, people counter that with, but I don't want to give my baby like a whole bone to chew on, which fair.

I mean, choking hazards are not great.

But look how perfect their jaw could have been.

But yeah, it's thought to be potentially because of general softening of our diet.

Yeah, and you're weakening the mineral bonds as well.

So it just starts to like fragment.

Also, like if you see a bone out in the sun, if you're like walking in the desert or whatever, it looks like almost wood.

It like fragments so much.

Yeah, it's the same thing.

It's the heat impact just slowly.

Yeah.

And we see that in the fossil record, too.

That's how we know if something's been buried right away or sat out in the sun for a long time and then got buried.