Body Clocks
b'Are you a morning person or a night owl? Whichever you are, your daily rhythm is determined by your circadian clock - powered by a small group of cells in the brain - and it tells you when to get up and when to sleep. Now Professor Bill Wisden and his team at Imperial College have discovered a second biological clock in the brain, located in a little cluster of nerve cells that produce a chemical called histamine, which helps to wake us up. Kat spoke to him to find out more about this molecular alarm clock. Like this podcast? Please help us by supporting the Naked Scientists'