成人快手

Nassim Nicholas Taleb, considers the significance of random events - how one man's disaster is another's victory and why it matters. He is a professor of risk engineering at New York University and the author of a series of books on randomness, including The Black Swan and more recently, the bestseller Antifragile - which discusses how we can all learn and profit from random events. He gives us a synopsis of the thesis behind his new book.

Also, in the first of a series which looks at some of the world's dying trades, Tom Burridge reports from the Andalucian capital of Seville on the traditional business of knife sharpening. And from Kenya, Wycliff Muga examines the challenges facing the country's family planning policy-makers.