Most Viewed From BBC Horizon

It was one of humankind's most epic quests - a technical problem so complex that it challenged the best minds of its time, a problem so important...

British journalist and physician Michael Mosley sets an ambitious goal: to become healthier and lose weight while making as few changes as possible...

In medical science, there’s been no longer harder fight than against malaria. This is the inside story of a historic new vaccine - from the...

You might think that your memory is there to help you remember facts, such as birthdays or shopping lists. If so, you would be very wrong. The...

New planets are now being discovered outside our solar system on a regular basis, and these strange new worlds are forcing scientists to rewrite the...

Horizon visits state-of-the-art laboratories and uses CGI to recreate the science-fiction-worthy weather experienced on other planets.

Exploring the murky and fast-paced world of the hackers out to steal money and identities and wreak havoc with people's online lives, and the...

A new era in the search for alien life has arrived as numerous bodies of life-sustaining water have been found all over our solar system.

Six months after the explosions at the Fukushima nuclear plant and the release of radiation there, Professor Jim Al-Khalili sets out to discover...

The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and...

Imagine a world where infinite copies of you are playing out every storyline of your life. It sounds like a plot stolen straight from Hollywood, but...

In Los Angeles, a remarkable experiment is underway; the police are trying to predict crime, before it even happens. At the heart of the city of...

To celebrate the 30th anniversary of its launch, this film tells the remarkable story of how Hubble revealed the awe and wonder of our universe and...

Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists...

You might think that your memory is there to help you remember facts, such as birthdays or shopping lists. If so, you would be very wrong. The...