Bang Goes the Theory - Helium Shortage, Radiation and Airport Security

Seizoen: 5 - Aflevering: 7 / 33 - Eerst uitgezonden: 26 september 2011 - Episode ID: 583798

Dallas investigates a potential global helium shortage, Dr Yan tests shoppers on how much they know about radiation, and Liz tries out the new airport security technology that can see beneath your clothes.