Monosodium glutamate

"The Infinite Monkey Cage" is a light-hearted weekly science show on BBC Radio 4 hosted by Brian Cox (champion telly physicist and former member of pop group D:Ream) and Robin Ince (stand-up comedian and mate/whipping boy of Ricky Gervais).

The theme of the latest half-hour episode is science fiction and the learned guests are Alan Moore, Wossy and Brian Greene (another telly physicist and the only non-Brit). You can listen to their lively convo here - www.bbc.co.uk/podcasts/series/timc

Trust me, it's terrific.