Watch the awesome fight for survival as a grown male polar bear takes on a walrus colony at the edge of the Arctic circle. WATCH MORE: Hiroshima: http://bit.ly/BBCHiroshima Horizon: http://bit.ly/BBCHorizon Best of Alan Partridge: http://bit.ly/BestOfAla...

We start in 2019 and travel exponentially through time, witnessing the future of Earth, the death of the sun, the end of all stars, proton decay, zombie galaxies, possible future civilizations, exploding black holes, the effects of dark energy, alternate...

Watch the awesome fight for survival as a grown male polar bear takes on a walrus colony at the edge of the Arctic circle.

Some wise and honest words from Sir David Attenborough on the subject of God, Creation, Genesis 1-3 and Richard Dawkins (from In Confidence: An Interview by Laurie Taylor)

A spectacular concert has taken place at Buckingham Palace to mark the Queen’s Platinum Jubilee, celebrating her 70 years on the throne.