Are satellites safe from terrorist attacks?

What happens to helium balloons that float away? Are satellites safe from terrorist attacks? Why does the truth hurt? Why does some poo float after flushing? Are there any treatments for tinnitus? Do headphones contribute to tinnitus? What are restless legs? What is the best way to regulate cortisol levels? Why does the body wake us up to wee? Dr Chris Smith and Clarence Ford have all the answers... Like this podcast? Please help us by supporting the Naked Scientists (thenakedscientists.com/donate)