How do batteries work?
Batteries power lots of stuff that people use everyday, like cellphones, toys and laptop computers. Some batteries can even be recharged after they run out of juice. But how do batteries store electri...
8 Marras 20247min
Why do we rub our eyes when we're tired?
It seems universal that when a person - old or young - is tired, they rub their eyes. It’s even a way that babies communicate to their adults that they are ready for bed. Are we just born understandin...
7 Marras 20243min
How do lightbulbs work?
Have you ever turned on a light and wondered, “How does that thing light up, anyway?” Us, too! We asked Tim Pula of the Smithsonian’s National Museum of American History to help us find the answer. Go...
6 Marras 20245min
Why do ostriches stick their heads in the ground?
Ostriches are super neat! They’re the world’s heaviest birds, and they lay the largest eggs of any bird on Earth. They grow up to 8 feet tall, and can run as fast as 45 miles per hour. But you know wh...
5 Marras 20245min
How does anesthesia work?
Sometimes, doctors use something called anesthesia to help them treat patients. Anesthesia can be different substances, but they all prevent our bodies from feeling pain during a medical treatment or ...
4 Marras 20245min
Why do we need belly buttons?
We all have a belly button. Right there, in the middle of our belly, there’s a nub. Some go in, some stick out, but what exactly are they for? We asked pediatrician Emma Gerstenzang to help us find th...
1 Marras 20245min
What produces eye gunk when we sleep?
Have you ever woken up in the morning with the corners of your eyes filled with crud? Sleepy sand? Eye goblins? Dozy dust? Bed boogers? Why do our eyes make this stuff, anyway? And why does it build u...
31 Loka 20245min
How does bug spray work?
Bug spray helps us keep mosquitoes and other insects away. But how does it work? We asked insect expert Meredith Cenzer to help us find the answer. Got a question buzzing around your brain? Send it to...
30 Loka 20246min
