How did life on Earth begin?
Astrobiologist Paul Davies's theory on this age-old conundrum is more radical than most - that life started elsewhere in the solar system and travelled to our planet in a meteorite - but his case is corroborated by some serious scientific evidence.

With Kirsty Lang.
Followed by Weather

- Profile Peter White , himself a blind man, assesses the Labour Party's uncompromising, polemical and scrupulously private Home
Secretary.

2/2
Ben Anderson concludes his adventures along Africa's west coast, where modern-day states live with a legacy of slavery, colonial carve-ups and horrific civil wars. In the impoverished Ivory Coast he finds a basilica taller than the Vatican, while in Benin voodoo is flourishing and a huge oil spill in Nigeria's delta has blighted the land. See Monday choice.

Haydn's The Creation, as performed by the Orchestra of the Age of Enlightenment.