Exploring the secret world of the biological clock.
Featuring an experiment that aims to reveal why it is hard for some people to gain weight.
Brian Cox explores the mysteries of time, discovering that a day is never 24 hours long.
A scientific investigation into the meaning of dreams, drawing on personal testimony.
Professor Brian Cox journeys in search of the energy source of the future - nuclear fusion
Why hasn't science worked out how to predict when and where the next quake will happen?
What makes ordinary people commit acts of violence? Michael Portillo investigates.
7/15 Adam Rutherford meets a new creature created by American scientists - the spider-goat.
15/15 Horizon investigates how close humankind is to creating artificial intelligence.
2/15 How a new generation of super-telescopes are helping astronomers explore the universe.