Originally published at: https://bigideas.network/helium/

There is twelve times as much helium in the universe as all the other elements (except hydrogen) combined, but it’s one of the rarest elements on Earth.

It is so light that it floats to the very top of our atmosphere and diffuses into space, so most of the helium we have on Earth (including every helium balloon you’ve ever held) has recently come from the radioactive decay of uranium and other radioactive elements…

You can read or listen to Helium at The Big Ideas Network. Share your thoughts on it below!