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.
Did you know that cosmic radiation is up to one-hundred times greater at cruising altitude than on the ground? Learn more on this Moment of Science.