Series exploring topical scientific issues.
Horizon launches the £10 million Longitude Prize 2014.
Documentary on Comet ISON, which was hoped to be the most spectacular comet in many years.
Liz Bonnin reveals some of the technologies and innovations set to transform our lives.
A look at the odds doctors have overcome to achieve breakthroughs in transplant surgery.
Series exploring topical scientific issues
Horizon reveals how CERN is searching for the Higgs particle and why it is so significant.
A look at the geological forces that unleashed the devastating Japanese earthquake.
A look at how our understanding of intelligence has transformed over the last century.
A skeleton was found in Italy; bone structure suggests the owner was an ancient athlete.