This month we're taking a trip into the world of developmental genetics, finding out how an animal grows from one cell into many millions as it develops from a fertilised egg, and discovering how it knows when it's grown enough. We also hear about the hunt for genes involved in autism, see what sticklebacks can tell us about evolution, ponder the purpose of keeping 9,000 placentas, and ask whether we can ever genetically engineer humans to drink seawater. And the monster raving loony gene of the month is the wacky-sounding Lunatic Fringe. Like this podcast? Please help us by supporting the Naked Scientists

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