Helium gas field found in Tanzania A newly discovered helium gas field in Tanzania is hailed as a "game changer" by scientists and the company hoping to exploit it. Helium is a rare gas used in medical scanners, scientific research, spaceships, weather balloons and telescopes –- as well as party balloons and for squeaky-voiced comic effect -– and it is thought world consumption is far outstripping production, raising concerns of a global shortage. IMAGES AND SOUNBITES