Bbc Podcasts: Episode 91: Ship's Chronometer From Hms Beagle 11 Oct 2010

Neil MacGregor, Director of the British Museum, looks at an instrument that first helped Europeans to navigate with precision around the world - a marine chronometer. In particular the chronometer that accompanied Charles Darwin on his historic voyage around the world on board HMS Beagle. With contributions by geographer Nigel Thrift and geneticist Steve Jones. (Duration: 15 mins)