Helium isn't just the stuff they put in balloons that makes your voice sound funny when you inhale it. This gas is also used in a wide variety of settings, from medical research technology and nuclear reactors to the blimps that fly over football stadiums on Sunday afternoons in the fall.
Although it's one of the most common elements in the universe, helium is relatively scarce here on planet Earth, and there aren't many places where helium production is a viable option. That's created fears about what will happen if we run out. Learn more about the ongoing helium shortage.