Dr. Yara Haridi

Birds kind of like do a grab and swallow.

They got a crop.

They also have like sometimes little keratin horns on their tongue that help them push things back into their gullet.

Yeah, their crop has like all these little stones sometimes and grit and stuff that helps them chew.

But they're kind of like whole meal eaters, really.

Yeah, they don't really chew.

They'll tear things apart, you know, and feed their babies and stuff, but they won't chew.

There is one hypothesis that basically as teeth were lost in birdie ancestors, that's when the beak started to fully envelop.

Because it's kind of hard to imagine how beak and teeth coexist.

Does the tooth keep growing through the beak?

How do those two tissues merge?

I'm not saying it can't happen, but so far as we know...

Things that have true beaks in the fossil record do not tend to have teeth, at least on the bird side.

So birds are dinosaurs.

So on the direction of evolving to birds, they lost a lot of their teeth and did full rhamphitheca, which is the fancy word for beak.

So, I mean, a goose is gonna, like... You can take a goose.

Guys, most of you can take a goose.

Don't upset the geese, but you can take a goose.

You'll see, like, little bumps on the goose's beak, and that's just keratin, like, sticking down.

They're not true teeth.