Profile of autistic professor Dr Temple Grandin, who is famous for her ability to talk to animals and understand their behaviour in ways no one else can. She believes her remarkable skill developed as a result of her brain disorder and claims she experiences life in the same ways as the animals themselves.

The story of American millionaire Robert Graham, who planned to improve the next generation of the human race by setting up a sperm bank where all the donors were geniuses. Featuring dramatic reconstructions and contributions by some of the 200 people conceived as a result.

Documentary highlighting the view of many astronomers who believe Pluto should be classed as an asteroid, along with an exploration of exactly how many planets there are in the solar system. Featuring accounts from the International Astronomical Union members.

An intriguing take on man's passionate but ultimately fatal attraction to the cigarette. Filmed across the world on a single day, the documentary explores people's strange love affair with nicotine and whether, with the known risks becoming more acute by the day, they've finally reached the end of a romance that's lasted some 500 years. Contributors include anti-smoking expert Allen Carr, who claims he can help anyone quit, nicotine patch inventor Dr Jed Rose, and Dr Chris Proctor - chief scientist at British American Tobacco - who is attempting to make a `safer' cigarette. A unique insight into the love-hate relationship that divides the planet.

Explosive new evidence that overturns conventional theories about exposure to radiation. Following the nuclear disasters at Hiroshima and Chernobyl, it was assumed that such horrors could trigger cancerous diseases, but scientists reveal a changing attitude toward the phenomenon.

A team of scientists set out to unravel the mystery of how pieces of glass predating the ancient Egyptians managed to become buried in the Sahara Desert. They travel to the Great Sand Sea, the wastes of Siberia and the test site for the world's first atomic bomb in New Mexico, uncovering a strange theory involving a previously unknown natural phenomenon.

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