Cassini-Huygens space probe reaches Saturn

Nasa's 3.3 billion-dollar Cassini-Huygens probe goes into orbit around Saturn after a seven-year journey. How underground bacteria release mineral arsenic that leaches into well water in Bangladesh and West Bengal to cause the worst case of mass human poisoning on record. The 3D virtual dissection of an ancient Egyptian mummy is on show at the British Museum, London. How global warming could reduce rice yields.