helium

Helium weather balloon being launched in a field
Wolke Benutzer

I've never thought about this before, but where exactly does helium come from?  Turns out, the gas comes from rocks decaying underground. It can't be manufactured and it's not renewable. Scientists are warning that our helium reserves are being quickly depleted. The Independent reports that the we could run out of helium in 25 to 30 years...