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Joe Letteri, Oscar-winning co-creator of Gollum on screen, looks at the evolution of computer animation as the next instalment of The Hobbit trilogy reaches cinemas.
Historian Peter Westwick and his colleague Peter Neushul thought up their scientific history of surfing, The World in the Curl (Crown, 2013), on boards off the coast of California. As the winter surfing season gets into full swing, Westwick talks about warfare, wetsuits, climate change and forecasting surf.
Jad Abumrad co-hosts Radiolab, the science-heavy, nationally syndicated US public-radio show. As it enters its tenth year, he takes time out from a 21-city North American tour with co-host Robert Krulwich to talk about crafting high-speed science stories on radio.