What keeps the Olympic torch alight, in flight? To keep the Olympic spirit burning, it must need to travel on aeroplanes, but how do you keep a naked flame burning, while keeping other passengers safe? We find out from one of the designers of the Sydney Olympic Torch. Plus, we ask why earplugs seem to amplify your internal noises, and they may have all died out, just how long did a dinosaur live? Like this podcast? Please help us by supporting the Naked Scientists