How do narwhal tusks grow?

We’re back! We’ve officially moved into our new headquarters! Come unpack with us and get a tour while we fill you in on some big news. Plus, new episodes of Brains On coming later this month and new Smash Boom and Forever Ago after that. If you want to support the show or drop u ...  Show more

We're moving the Brains On Universe Headquarters, and that means we have to stop putting out new episodes until we get settled. We know: not cool. But, our new home is going to be bigger and better and the absolute BEST. We can't wait until it's ready for you to visit.In the mean ...  Show more

Narwhals are whales, and super cool ones at that. But that cool thing coming out of their heads is a tusk, not a horn. Which means it’s a tooth! And it’s the only known spiral tooth to boot!

In this episode, we learn all about narwhals (what that tusk is for and how ...

In our most recent episode, we answered questions about  really big animals: whales!

We covered a lot when it comes to these huge aquatic mammals but there was one big topic we didn't get to: and that's how whales communicate.  We'll learn more about the sounds whales ...

How do whales use their blowholes to breathe, and what keeps them from filling up with water? There’s no better way to find out than getting up close and personal with whales! That’s what marine mammal biologist Justine Hudson did when she collected whale snot from belugas. Snot ...  Show more

Are unicorns real? Who made them up? Where do they come from? What do they eat, how big are they, and do they have rainbow manes? We're answering all of your questions about unicorns-and learning about other mythical creatures as well with Adam Gidwitz, creator of The Unicorn ...