What's the best way to catch 40 winks? We investigate the science of sleep, including why we need it and why do some people fall asleep at the wrong times? Jason Rhiel tell us how he investigates what makes us sleepy using zebrafish and Mick Hastings explains the effects of shift work on our health. Plus, in the news, nanoparticles deliver vaccines without needles, the 4,000 year old body perfectly preserved in a bog, an animal that can keep track of tides, a new nose grown on a forehead, and nurturing new neurones to treat Parkinson's... Like this podcast? Please help us by supporting the Naked Scientists