Why do people wake up at 3am after drinking? Why is hot water cloudy? What drives a gust of wind? How does a coil of wire produce electricity? Is sweat from your face different to sweat from elsewhere on your body? What is diverticulitis? Does putting a remote next to your head increase the distance over which it will work? Plus, a new surgical glue inspired by slug mucus. Chris Smith answers your questions with Eusebius McKaiser on South Africa's Talk Radio 702...