A baby grabs the string of a single helium balloon and floats right out of its baby carriage. Why can't people really float into the air using helium balloons?
The chair you're sitting on and even the computer you're reading could be considered empty space!
Find out why the world, as we know it, is mostly empty space.
You may not realize it, but you're full of emptiness. Learn more on this Moment of Science.
Wouldn’t it be nifty if there was a way we could see into rocks without having to break them? Just think of it. If we could see inside of rocks without having to slice them open, then perhaps we could see into rocks on other planets like Mars. And maybe then we could detect forms of life inside these rocks.
To create a bomb based on nuclear fission, the scientists working on the top secret Manhattan Project had to find fissionable fuel. They settled on enriched uranium.