Horizon

- Season 46

(2009)

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This documentary tries to answer the question of what makes a person who they are, through putting the show host through a series of experiments and scientific tests.

Horizon follows the emotional journey of three young people with currently untreatable conditions to see if, within their lifetime, they can be cured.

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In a Horizon special, naturalist Sir David Attenborough investigates whether the world is heading for a population crisis. In his lengthy career, Sir David has watched the human population more than double from 2.5 billion in 1950 to nearly seven billion. He reflects on the profound effects of this rapid growth, both on humans and the environment. While much of the projected growth in human population is likely to come from the developing world, it is the lifestyle enjoyed by many in the West that has the most impact on the planet. Some experts claim that in the UK ...

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Science series. How much is really known about the medicines we take, and can they be trusted to work. Horizon investigates the most popular pills people pop.

Horizon meets the scientists who are attempting to piece together why we age and more vitally for all of us, what we can do to prevent it.

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