From the brains behind brains on, this is the moment of um.

Answering those questions that make you go, um, um, moment of um, um, um, um comes to you from APM Studios. And I'm a mom.

Um.

And yesterday, I was playing with my baby Josie.

This little piggy went to market and this little piggy to market, and this little piggy went home.

And this little piggy ate roast beef, and this little piggy had none.

When I got pretty preoccupied with something,

and this little piggy wants to know why we have toes.

What do they do?

Your toes are so cutie, my little patootie.

Yes, they are, but from this angle, they do look a bit like piggies.

Turns out, Erin from California had the same question.

Hi, my name is Erin from Chino, California, and I like to ask, why do we need

our toes so much? We humans have pretty special feet. We're the only animals alive today that

walk around on two legs in the way that we do. My name is Darcy Shapiro, and I'm an evolutionary

anthropologist who studies the evolution of hips and walking. It's called striding bipedalism,

which sounds really fancy. Kangaroos move around on two legs. They hop. Birds also walk on two

legs. The bones in their lower legs and feet aren't arranged

quite the same way ours do, so their walk is different from ours. So we're pretty unique.

And we didn't always walk this way. The feet of our closest living primate relatives, like

chimpanzees and bonobos and gorillas, they're different from ours.

Their toes are longer and their big toe is separated from the other toes the way our thumbs are

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