Documentary which maintains that the real pioneers of space exploration were the Soviet cosmonauts, telling the story of how the Russians led us into the space age. Show more

Series telling the story of how the development of civilisation was influenced by planetary forces. Professor Iain Stewart explores the role of the Earth's interior. Show more

Professor Iain Stewart explains what meteorites and asteroids are, where they come from, the danger they pose and the role they have played in Earth's history. Show more

Professor Iain Stewart sets sail on one of the fastest racing boats ever built to explore the story of our turbulent relationship with the wind. Show more

Dr Alice Roberts finds out how the experts put dinosaur skeletons back together, with muscles, accurate postures and even, in some cases, the correct skin colour. Show more

Professor Martin Rees, the astronomer royal, searches for extra-terrestrials in a film that gets inside the minds of the scientists considering whether we're alone in the universe. Show more

Dr Kevin Fong guides us through an ethical and scientific minefield as he considers whether sending men to Mars is worth the risk and if it is really achievable. Show more

Dan Snow follows in the footsteps of the prospectors of the 19th-century Klondike gold rush. The team finally set about the back-breaking work of mining for gold. Show more

On this leg of the epic journey following in the footsteps of 19th-century Klondike gold rush prospectors, Dan and his team attempt to traverse perilous waterways. Show more

Multi-layered documentary revealing the human story of Marie Curie, whose pioneering research on radioactivity made her the world's most famous female scientist. Show more

Dr Iain Stewart traces the history of climate change from its very beginning and uncovers some of the great unsung heroes of climate change science. Show more

Alice Roberts looks through 45 years of Horizon archive material to see how science came to understand sex, strived to solve our problems with it and even helped us do it better. Show more

Gabrielle Walker tells the remarkable story of how we discovered that the air around us is not just empty space, it is full of hidden wonders. Show more

Dallas Campbell looks back over decades of Horizon and BBC archive to chart the key scientific breakthroughs that have transformed road safety and saved millions of lives. Show more

Dallas Campbell looks back through almost 50 years of the Horizon archives to chart the scientific breakthroughs that have transformed our understanding of the universe. Show more

Michael Mosley uses the BBC archives to chart scientists' progress as they probed the mind of the murderer to try to understand why people kill, and whether it can help prevent it. Show more

Documentary series. Dr Iain Stewart tells the story of planet Earth. Although they appear to be destructive, volcanoes have been crucial to the development of life. Show more

A look at three key numbers that clarify the important questions on climate change, giving a unique perspective on what we know about the past, present and future of our climate. Show more

Dan Snow leads a team of adventurers on an epic journey across the Canadian wilderness. In this episode, Dan and his team take on the Alaskan Coastal Mountains. Show more

Kate Humble and Dr Helen Czerski follow the Earth's voyage around the sun for one complete orbit, travelling first from July to the December solstice and showing its effect. Show more