Back up to: Horizon
Investigating the discovery of what is ominously being called 'dark flow'.
Horizon asks whether eating cooked food prompted changes that helped humanity evolve.
A professor of mathematics asks if geniuses' brains are fundamentally different from his.
How infinity is older than time, bigger than the universe and stranger than fiction.
Looking at discoveries which suggest ageing is something flexible that can be manipulated.
How much is really known about the medicines we take, and can they be trusted to work?
Horizon follows researchers attempting to unravel the many secrets of viruses.
How research into dogs is giving scientists a greater understanding of human behaviour.
Sir David Attenborough investigates whether the world faces a population crisis.
Alan Davies attempts to answer the proverbial question: how long is a piece of string?
Horizon investigates speech, a phenomenon unique to humans, which remains a mystery.
What was there before the big bang? Black holes could hold the answer.
Three people with untreatable conditions see if, within their lifetime, they can be cured.
The search for answers to one of science's greatest mysteries: how do we know who we are?
Addiction expert John Marsden explores our relationship with alcohol.