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Horizon is a documentary series that first started to air in 1964 on BBC 2. The series has aired for almost half a century, and has produced a huge number of historical documentaries. The series covers topics that include such things as the history of warfare, advances in medicine and science, and the careers of numerous politicians. The series has had a number of presenters and voice-over hosts during its run with Paul Vaughn hosting 134 episodes. Each episode of Horizon is fifty minutes in length. The series has won the Royal Television Award for Film, and a British Academy Award.

Tuesday 9:00 PM et/pt on BBC TWO
1 Season, 17 Episodes
December 2, 2008
Documentary & Biography
8.7/10
Cast: Paul Vaughan
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Horizon Full Episode Guide

  • Einstein's Theory of General Relativity is still one of the pillars of modern physics. But 100 years after Einstein's theory, there's something that seems to undermine everything we thought we knew - Dark Energy. No one can see it, and there is still great debate over what it is.

  • How bad can our drinking pattern be for our health? Doctors and genetically identical twins Chris and Xand van Tulleken want to find out. The twins embark on self-experimentation to see the effects of different drinking patterns on their health, with surprising results.

  • For centuries we have dreamt of reaching the centre of the Earth. Now scientists are uncovering a bizarre and alien world that lies 4,000 miles beneath our feet.

  • On top of a mountain in the Canary Islands a machine is collecting radiation from the far reaches of the universe. Scientists are using this huge microscope to find the smallest thing in the universe.

  • Horizon travels all the way to the edge of existence, unlocking some surprising stories. Are there parallel universes beyond our own? Does our universe have an edge? There is evidence to suggest that the universe next door is already knocking.

  • Horizon climbs aboard with the hurricane chasers of America's National Oceanic and Atmospheric Administration and discovers that over the last decade, storms have been getting faster and more powerful.

  • According to scientists, activity on the surface of our Sun is ramping up. This activity increases the risk of massive storms of plasma. But what are solar storms, what will they mean for us and our planet - and what can we do to lessen their impact?

  • For centuries asteroids have been ignored by science, but scientists have made some very strange discoveries that could solve one of the greatest mysteries in science - how water arrived on Earth. Will asteroids change the world as we know it?

  • Can you really believe your eyes? Horizon reveals some of the strangest illusions created by science to show how our natural senses really work... and how we could learn to manipulate them.

  • What came before the Big Bang? It's the science question people most want answered. Horizon takes an incredible journey through mind-bending theories into the land before time.

  • Using archive footage and vivid eyewitness testimony, this film enters the moments when our decisions could mean the difference between life anddeath, busting myths, uncovering practical tips and revealing what happens in our brains in times of crisis.

  • The ability to cook is unique to humans - something most of us take for granted. Horizon attempts to unravel the paradox: do we cook because we are human, or did cooking make us the humans we are today?

  • They're one of the most destructive entities in the universe. But despite their immense mass and influence on stars and galaxies, no-one has ever seen a black hole. Horizon meets the astronomers attempting to image a black hole for the very first time.

  • Could nuclear fusion hold the answers to the energy crisis? Brian Cox peers beyond the glare of our Sun to reveal the hidden forces that provide its power. Will scientists be able to harness fusion power and achieve abundant, cheap, clean energy?

  • How do we really know what time it is? Professor Brian Cox goes in search of the answer. From our historical dictator of time, the Sun, to the physical definition of a second by an atomic clock, Brian discovers telling the time is a tricky business.

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Horizon is available to watch free on PBS and stream on BBC TWO. You can also stream, download, buy, rent Horizon on demand at Amazon Prime, PBS online.