Horizon - Season 42 (2005)

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A psychological investigation of the mind of suicide bombers, and of normal people in general.

Biology stands on the brink of a shift in the understanding of inheritance. The discovery of epigenetics - hidden influences upon the genes - could affect every aspect of our lives.

The massive fluctuations that El Nino causes in the world's weather systems have changed the course of history. Would these events have happened without the impact of El Nino?

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Millionaire optometrist Robert Graham believed that many intellectuals were dying childless, yet less-intelligent people were constantly reproducing. He wanted to bring thousands of geniuses into the world to ensure the future of the human race. In the early 1980s, he established a Repository for Germinal Choice - a sperm bank stocked full of 'donations' solicited from some of the world's most brilliant men; and he began with Nobel Laureates. This is the story of an endeavor that many agree laid the foundations for modern sperm banks.

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The extraordinary story of how a mysterious gem in one of Tutankhamun's necklaces led to the discovery of a dramatic new cosmic threat.