Skip to main content Skip to navigation

Dear Dr. Universe: How do some trees survive wildfire? 

While it might seem like wildfires only cause destruction, they are actually a natural and important part of keeping forests healthy. After many years, trees have adapted to their homes. Some are pretty invincible when it comes to surviving a wildfire.

Read more

Listen!  

Watch! 

How does a string of lights work?

Just the other day I was taking down a string of lights from my lab, when I discovered the bulbs were burnt out. I visited my friend Aaron Crandall, an engineer at Washington State University, to see if I might get them working again.

Read more

 

Why do animals live in groups?

Fish swim in big schools. Baby ducks waddle in a straight line. Ants and bees divide up labor. The world is full of animals that live in groups and they do it for a few different reasons.

Read more

How is glass made?

We can make glass in factories and we can find it in nature. Some volcanoes make glass. When they spew out lava, it often cools into obsidian, a black glass. Glass can also form on sandy beaches. Small tubes with smooth glass on the inside may appear after super-hot lightning strikes the sand.

Read more

Do all animals pass gas?

If you’ve ever been near a cat or dog when they tooted, the smell might have sent you running right out of the room. A lot of animals pass gas. But believe it or not, some animals do not.

Read more

Got Cat Mail? 

Sign-up for the weekly e-newsletter to get the latest answers, activities, and videos!