Roses are red, violets are blue but according to the latest understanding these colours are really an illusion. One that you create yourself. Horizon reveals a surprising truth about how we all see the world. You may think a rose is red, the sky is blue and the grass is green, but it now seems that the colours you see may not always be the same as the colours I see. Your age, sex and even mood can affect how you experience colours. Scientists have unlocked the hidden power that colours can have over your life - how red can make you a winner, how blue makes time speed up. Watch an experiment where for people in a blue pod, a minute lasts 11 seconds shorter.

A documentary-horror film exploring the phenomenon of 'Sleep Paralysis' through the eyes of eight very different people. These people often find themselves trapped between the sleeping and waking worlds, totally unable to move but aware of their surroundings while being subject to frequently disturbing sights and sounds. A strange element to these visions is that despite the fact that they know nothing of one another, many see similar ghostly 'shadow men.' This is one of many reasons many people insist this is more than just a sleep disorder". This documentary digs deep into not only the particulars of these eight people's uncanny experiences, but it also explores their search to understand what they've gone through and how it's changed their lives. Directed by Rodney Ascher, he chose to focus on sleep paralysis as it had happened to him in the past. The film's crew initially began approaching participants via message groups, videos and a half dozen books that had been written.

A team of artists and activists exposes the hidden world of extinction with never-before-seen images that will change the way we see the planet. Two worlds drive extinction across the globe, potentially resulting in the loss of half of all species. The international wildlife black market at the expense of creatures that have survived on this planet for millions of years. And the other surrounds us, hiding in plain sight — a world that the oil and gas companies don’t want the rest of us to see. Using covert tactics and state-of-the-art technology, the Racing Extinction team exposes these two worlds in an inspiring affirmation to preserve life as we know it.

The definitive discourse with Noam Chomsky on the defining characteristic of our time - the deliberate concentration of wealth and power in the hands of a select few. Chomsky unpacks the principles that have brought us to the crossroads of historically unprecedented inequality - tracing a half century of policies designed to favour the most wealthy at the expense of the majority. "Requiem for the American Dream" is profoundly personal and thought provoking. Chomsky provides penetrating insight into what may well be the lasting legacy of our time - the death of the middle class, and swan song of functioning democracy. A potent reminder that power ultimately rests in the hands of the governed, "Requiem for the American Dream" is required viewing for all who maintain hope in a shared stake in the future.

David Attenborough asks three key questions: how and why did Darwin come up with his theory of evolution? Why do we think he was right? And why is it more important now than ever before? David starts his journey in Darwin's home at Down House in Kent, where Darwin worried and puzzled over the origins of life. David goes back to his roots in Leicestershire, where he hunted for fossils as a child, and where another schoolboy unearthed a significant find in the 1950s. And he revisits Cambridge University, where both he and Darwin studied, and where many years later the DNA double helix was discovered, providing the foundations for genetics. At the end of his journey in the Natural History Museum in London, David concludes that Darwin's great insight revolutionised the way in which we see the world. We now understand why there are so many different species, and why they are distributed in the way they are. But above all, Darwin has shown us that we are not set apart from the natural world, and do not have dominion over it. We are subject to its laws and processes, as are all other animals on earth to which, indeed, we are related.

A stunning documentary about the escalating global nuclear arms crisis, Countdown to Zero is a fascinating and frightening exploration of the dangers of nuclear weapons, exposing a variety of present day threats and featuring insights from a host of international statesmen and experts. Among the voices are President Jimmy Carter, Mikhail Gorbachev, Pervez Musharraf, Tony Blair, former CIA Operations Officer Valerie Plame Wilson, the Ploughshares Fund’s Joe Cirincione and Stanford political scientist Scott Sagan. traces the history of the atomic bomb from its origins to the present state of global affairs: nine nations possessing nuclear weapons capabilities and others racing to join them, with the world held in a delicate balance that could be shattered by an act of terrorism, failed diplomacy, or a simple accident. It makes a compelling case for worldwide nuclear disarmament, an issue more topical than ever with President Obama and other world leaders working to revive this goal today. Written and directed by Lucy Walker, Countdown to Zero was screened for attendees of this year’s Global Zero International Conference in Paris and the TED Conference in Long Beach, California.