Stupid Genius

Rainbows are beautiful and colorful, but why do they happen? Emma will try to find out, and she'll go into VidCon and her crazy nail story.

Emma's had some crazy dreams, and you've no doubt had some too. She's going to try to figure out their meaning, and why we even have them at all.

Our bodies are incredible, we can cut ourselves and break our bones, and they'll heal. But why do the heal? Emma has broken plenty of bones, and she's going to get to the bottom of it.

Whether you love it or hate it, most of us are ticklish. But what is it about tickling that causes us to laugh? Let's find out the science behind tickling.

You've seen those videos of people scaring their poor, unsuspecting cats by placing a cucumber next to them without them realizing it, right? Why does it affect the cats so much? Emma's about to do a deep-dive to figure it out.