naturphilosophie.co.uk
Helium - Lighter than Air - NaturPhilosophie
More Than Just Party Balloons... Helium is the second most abundant element in the Universe, after hydrogen. On Earth, helium is relatively rare, because it is one of the few elements that can escape gravity and leak away into space. Therefore, helium exists as a finite resource. But as our reserves of the precious element steadily decreases, helium is in increasing demand. In medicine, helium supports the fight against cancer...