Hi, you're about to get smarter in just a few minutes with Curiosity Daily from Discovery.

Time flies when you're learning super cool stuff.

I'm Nate.

And I'm Callie. If you're dropping in for the first time

welcome to curiosity where we aim to blow your mind by helping you to grow your mind. If you're

loyal listener, welcome back. Today you'll learn about how fingerprints form, how quickly you can determine whether or not you like a song,

and how ancient ancestors to Homo sapiens were using tools way earlier than we thought.

Without further ado, let's satisfy some curiosity. It's pretty

crazy that if you think about how many people there are on Earth, every one of

them has their own unique set of fingerprints. until quite recently scientists didn't

actually understand why that happens. So it's kind of crazy if you think about

how many different types of unique fingerprints there are, but it kind of feels like a

shower thought to me, like you're just staring at your fingers just like, huh, there's a lot of these.

Okay, but I do want to know more. Tell me more.

So fingerprints develop when we're in the womb.

The little ridges pop out on our fingertips and they begin expanding in waves from

three different points on each fingertip in what's known as a

Turing pattern and these ridges all begin as downward growth in the skin

similar to little trenches before the cells quickly multiply and grow upward.

But until recently, we haven't known exactly how they're forming in the womb or why.

Okay, I was never actually freaked out about fingerprints, but now I am.

But I do feel like I've heard a few of these

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