video documentary

Biology stands on the brink of a shift in the understanding of inheritance. The discovery of epigenetics -- hidden influences upon the genes -- could affect every aspect of our lives.

At the heart of this new field is a simple but contentious idea -- that genes have a 'memory'. That the lives of your grandparents -- the air they breathed, the food they ate, even the things they saw -- can directly affect you, decades later, despite your never experiencing these things yourself. And that what you do in your lifetime could in turn affect your grandchildren. (www.youtube.com)

Piece By Piece documents San Francisco's graffiti culture from the early 1980s to 2004. It is narrated by San Francisco graffiti artist Senor One, better known as Renos. The San Francisco Bay Guardian's Cheryl Eddy singled the film out as the highlight of the 2006 Hi/Lo film festival, calling it "an educational experience" and "a thoughtful document". In a full review for that same paper, Johnny Ray Huston said it was "a thorough history that still makes time ... for abstract, lyrical flowing passages".

Every year we spend £300 million on vitamin supplements, but do they actually do us any good? Some believe they offer the promise of preventing or even curing some of the world's biggest killers, such as heart disease and cancer. Others claim that taking large doses of some vitamins may in certain cases be harmful. So what are the facts?

Vitamin C, the most popular of them all

There is a new kind of weather to worry about, and it comes from our nearest star.

Scientists are expecting a fit of violent activity on the sun which will propel billions of tonnes of superheated gas and pulses of energy towards our planet. They have the power to close down our modern technological civilisation - e.g. in 1989, a solar storm cut off the power to the Canadian city of Quebec.

Horizon meets the space weathermen who are trying to predict what is coming our way, and organistions like the National Grid, who are preparing for the impending solar storms. (www.youtube.com)

BBC Horizon - Global Weirding (2012)

The Zambezi (also spelled Zambeze and Zambesi) is the fourth-longest river in Africa, and the largest flowing into the Indian Ocean from Africa. The area of its basin is 1,390,000 square kilometres (540,000 sq mi), slightly less than half that of the Nile. The 3,540-kilometre-long river (2,200 mi) has its source in Zambia and flows through Angola, along the borders of Namibia, Botswana, Zambia again, and Zimbabwe, to Mozambique, where it empties into the Indian Ocean.

t the British Museum, a collection of artefacts from the Muslim world is on show which tells the history of a journey to Mecca always forbidden to non-Muslims. It features a succession of examples of the rich visual language of Islamic culture past and present, artwork created to reflect the powerful experience for any Muslim making the Hajj pilgrimage to Islam's most sacred city and its most sacred building, the Ka'aba.

50 million years after the great dying, the Earth is just recovering, unti, tectonic movements split Pangea in two, but this brings massive volcanic eruptions and a downfall of the oxygen levels. (www.youtube.com)

BBC Invisible World III 2010. Richard Hammond explores the astonishing miniature universe all around us. (www.youtube.com)

BBC Invisible World II 2010. Richard Hammond explores the astonishing miniature universe all around us. (www.youtube.com)

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