Summary: What happens if you're exposed to the vacuum of space? Is using a mobile phone on a flight safe? Which is more contagious - a cough or a sneeze? This week we answer your sticky science questions, such as what makes Jam set? And how does ironing work? Plus, we meet the very first lumberjacks, locate the dark matter in our locality and find out how a small electric pulse can stop a seizure in its tracks...
