Today: Apollo 15

BBC science correspondent Reg Turnill delivers a brief report via telephone on Apollo 15's recent mission to the moon. He compares the mission's scientific discoveries with Charles Darwin's voyage on the 'Beagle' and discusses the so-called 'Genesis Rock', which it is believed might contain geological records of the moon's origins.

The retrieval of the sample of lunar crust labelled the 'Genesis Rock' is the defining achievement of the Apollo 15 mission. Found by James Irwin and David Scott, it is believed to date back to the time of the moon's creation - approximately four billion years ago - and possibly contains data about the formation of the Earth.