What caused Building 7 to collapse on 9/11? Dr. Leroy Hulsey from the University of Alaska Fairbanks may have the answer, following an exhausting four year engineering study.

Richard Feynman was a scientific genius with - in his words - a "limited intelligence". This dichotomy is just one of the characteristics that made him a fascinating subject. The Pleasure of Finding Things Out exposes us to many more of these intriguing attributes by featuring an extensive conversation with the acclaimed Nobel Prize winner. During the course of the interview, which was conducted in 1981, Feynman uses the undeniable power of the personal to convey otherwise challenging scientific theories. His colorful and lucid stories make abstract concepts tangible, and his warm presence is sure to inspire interest and awe from even the most reluctant student of science. His insights are profound, but his delivery is anything but dry and ostentatious.

Man has always sought to seek further afield. After the seafaring explorers of the 16th century, 21st century cosmologists today navigate more celestial oceans, with each mission providing an ever-broader and more impressive cartography of our surroundings. At the avant garde of modern technology, these strange travellers are actually immobile, and their vessels are powerful and spectacular telescopes, on the Earth or in space, constantly widening the limits of our knowledge and giving form to our dreams of infinity. From Hawaii to Australia, via South Africa and China, we set out on an incredible scientific and human adventure to visit the planet's greatest cosmic exploration centres to discover the new challenges involved in understanding the universe. A journey on Earth and in the heavens that will take your breath away!

In 1962, spurred by the Cold War, President John F. Kennedy famously made the bold proclamation that NASA would send astronauts to the moon by the end of the decade, not because it was easy, but because it was a challenge. The Space Race inspired a generation to pursue careers in science and technology, but as the balance of world power shifted, interest in space exploration declined. "Fight for Space" serves as an urgent call to re-awaken our sense of wonder and discovery.

The Dream Is Alive takes you into space alongside the astronauts on the space shuttle. Share with them the delights of zero gravity while working, eating and sleeping in orbit around the Earth. Float as never before over the towering Andes, the boot of Italy, Egypt and the Nile. Witness firsthand a tension-filled satellite capture and repair and the historic first spacewalk by an American woman.

A feature documentary about the journey of mankind to discover our true force and who we truly are. It is a quest through science and consciousness, individual and planetary, exploring our relationships with ourselves, the world around us and the universe as a whole.

Kate Humble and Helen Czerski reveal the inner workings of the sun and investigate why scientists think changes in the sun's behaviour may have powerful effects on our climate.

Many geneticists and archaeologists have long surmised that human life began in Africa. Dr. Spencer Wells, one of a group of scientists studying the origin of human life, offers evidence and theories to support such a thesis in this PBS special. He claims that Africa was populated by only a few thousand people that some deserted their homeland in a conquest that has resulted in global domination.

As society tackles the problem of feeding our expanding population safely and sustainably, a schism has arisen between scientists and consumers, motivated by fear and distrust. Food Evolution, narrated by Neil deGrasse Tyson, explores the polarized debate surrounding GMOs. Looking at the real-world application of food science in the past and present, the film argues for sound science and open-mindedness in a culture that increasingly shows resistance to both.

A celebration of the universe, displaying the whole of time, from its start to its final collapse. This film examines all that occurred to prepare the world that stands before us now: science and spirit, birth and death, the grand cosmos and the minute life systems of our planet.

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.

Most people fully accept paranormal and pseudoscientific claims without critique as they are promoted by the mass media. Here Be Dragons offers a toolbox for recognizing and understanding the dangers of pseudoscience, and appreciation for the reality-based benefits offered by real science.

William Shatner presents a light-hearted look at how the "Star Trek" TV series have influenced and inspired today's technologies, including: cell phones, medical imaging, computers and software, SETI, MP3 players and iPods, virtual reality, and spaceship propulsion.

A breathtaking adventure across five continents and through time to reveal nature's most vital secret. Watch a flying fox gorge itself on a midnight snack of figs. Climb into the prickly jaws of insect-eating plants. Witness a mantis disguised as a flower petal lure its prey to doom.

In 1858 Charles Darwin struggles to publish one of the most controversial scientific theories ever conceived, while he and his wife Emma confront family tragedy.

Unmasks fraudulent cover-ups, wild speculations, and deceitful myths that have been presented as the absolute "facts" of evolution. Should evolutionism, the foundational faith of eastern mystical thought, be taught in schools as science, when Creationism, the foundational belief of Judeo-Christianity, has been expelled?

Dr Helen Czerski delves into the Horizon archive to chart the transformation of a little-known theory into one of the greatest scientific undertakings in history.

Pioneering documentary-maker Philomena Cunk returns with her most ambitious quest to date; venturing right up the universe and everything, to find the definitive answer to the ultimate question – the meaning of life.

Wildlife photographer Richard Sidey joins an international team of whale research scientists in Antarctica to document their work on how Humpback Whales are adapting to a changing ocean.