When the space shuttle Challenger blew up in 1986, it was the most shocking event in the history of American spaceflight. The deaths of seven astronauts, including the first teacher in space Christa McAuliffe, were watched live on television by millions of viewers. But what was more shocking was that the cause of the disaster might never be uncovered. The Challenger is the story of how Richard Feynman, one of America's most famous scientists, helped to discover the cause of a tragedy that stunned America.

Science Channel reunites Joss Whedon, Nathan Fillion and the entire renegade crew of the Serenity for the first time ever to provide the complete oral history on the franchise that continues to explode in popularity — despite meeting its end a decade ago. The 60-minute special includes secrets from the set, exclusive cast interviews, and footage from this year's colossal Comic-Con panel that dominated the pop culture conversation.

The use of embryonic stem cells has ignited fierce debate across the spiritual and political spectrum. But what if we could create manmade stem cells - or find super cells in adults that could forever replace embryonic cells and remove the controversy? Today, we are on the brink of a new era - an age where we may be able to cure our bodies of any illness. Stephen HAWKING has spent his life exploring the mysteries of the cosmos, now there is another universe that fascinates him - the one hidden inside our bodies - our own personal galaxies of cells.

Richard Feynman is one of the most iconic, influential and inspiring scientists of the 20th century. He helped design the atomic bomb, solved the mystery of the Challenger Shuttle catastrophe and won a Nobel Prize. Now, 25 years after his death - in his own words and those of his friends and family - this is the story of the most captivating communicator in the history of science.

The wildlife and cultures of southern Asia have been shaped by one of the greatest phenomena on Earth: the mighty monsoon winds that sweep across this vast region, turning drought into deluge. All life – human and animal – is dominated by this rampaging weather system. From the northern shores of Australia to the highest peaks of the Himalayas and the wind-blown deserts of northern India to the lush equatorial forests of Borneo, this series makes an exhilarating journey through the lands of the monsoon. Along the way, it offers a taste of the variety and colour of the different regions’ most extraordinary wildlife and cultures and the way they cope with the tumultuous weather. This is the story of a relationship between humans and nature that has grown across thousands of years – all living in the shadow of the monsoon.

Led by archaeologist Ciprian Ardlean, this groundbreaking special unearths fresh archaeology that is transforming the understanding of when and who the earliest humans traveled to the Americas.

Stonehenge is one of the world's greatest mysteries. Now, a new discovery found deep in the soil of the surrounding area is threatening to upturn everything we think we know about this 4,500 year-old landmark. Rob Bell joins archaeologists, scientists and engineers who have uncovered a vast, previously undetected monument that is many times the size of the original henge.

During the Second World War, to give himself every chance of winning the conflict, Adolf Hitler instructed the most brilliant German scientists to develop advanced technology weapons of mass destruction. Among them were the V1, the first cruise missile, and the V2, the first ballistic missile. The document looks back at the context in which their creators worked and succeeded in designing innovations that laid the foundations of modern aviation and aerospace.

New evidence is revealing fresh twists to the fatal chain-of-events that caused the Titanic to sink, and using cutting-edge technology and the latest scientific methods, experts investigate the secret history of its infamous sinking.

Stephen Hawking changed everything we know about black holes but even today, scientists don't know how the very biggest were formed. Now new discoveries might finally solve the mystery of supermassive black holes and reveal the secrets of our galaxy.

Engineers count down the final moments in the world's first ever privately-funded moon mission. In what could be one of the greatest milestones in the history of private space travel, or a spectacular failure, it comes down to sticking the landing.