Palaeontologists recently discovered strata in South America showing packs of huge dinosaurs. These amazing discoveries have changed what we know about the dinosaur world. Paul Brightwell narrates. Show more

Last year, a tiny, fossilised jaw bone was found in a dusty museum. Scientists believe it holds the key to the mystery of the 'missing link' in our evolution. Narrated by John Shrapnel. Show more

The extraordinary story of the twin boys who grew up as Brian and Brenda. Thirty years after Bruce became Brenda, Horizon investigates the aftermath of this fascinating story.

Tracing the history and evolutionary implications of a controversial theory, which posits that for millions of years the Earth was entirely covered in ice up to a kilometre thick. Show more

First transmitted in 2000, Horizon follows an expedition to the Andes where wreckage from missing 1947 passenger plane Star Dust mysteriously reappeared. Show more