Dr. Universe: What materials would you use to make a rocket?
Whether it’s a model rocket you build in the backyard or one that launches a space shuttle, there are lots of materials you could use. So, when I saw your question I grabbed my lab coat and safety goggles, and zoomed over to my friend Jake Leachman’s lab. He’s a rocket scientist and engineer at Washington State University. » More …
Dr. Universe: What’s a microchip, how does it work, and what is it used for?
-Brook E., Doncaster, England
Microchips are smaller than your fingernail and packed with itty-bitty electronic parts. These parts are hundreds of times thinner than the hairs on your head, but sometimes you’ve got to think small to think big. » More …
What are the cookies used on gadgets? -Lydia, 8, Essex, England
A cookie is a tiny file of text that gathers information about you as you browse the web. You might be familiar with cookies if your computer has ever asked if you wanted to turn them on or off. » More …
Why do people and animals get cancer more than they used to? -Michael, Ceres, CA
A hundred years ago, human beings only lived to be about 50 years old. Now people are living longer, so there’s more time for cancer to develop in their bodies. That’s what I learned from my friend David Liu who researches cancer at Washington State University. » More …
Why do we get jealousy? I can feel it sometimes, too, but I don’t know why. -Hailey, 10, London, Ontario
Cats love attention, but we don’t get jealous like humans do. It’s one of those emotions that set human beings apart from other creatures in the animal kingdom. But I can’t imagine it’s the most pleasant. The poet William Shakespeare once called jealousy a green-eyed monster. Still, it’s an emotion that can help you navigate the world. » More …
Why did people invent movies? -Danielle, Latrobe, Tasmania
Movies not only took the ideas and inventions of people, but also the work of a horse. Her name was Sallie Gardner and the debate of her day was whether or not horses ever had all four hooves off the ground during a gallop. » More …