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250 million years ago, long before dinosaurs roamed the Earth, the land and oceans teemed with life. This was the Permian, a golden era of biodiversity that was about to come to a crashing end. Within just a few thousand years, 95% of the lifeforms on the planet would be wiped out, in the biggest mass extinction Earth has ever known. What natural disaster could kill on such a massive scale? It is only in recent years that evidence has begun to emerge from rocks in Antarctica, Siberia and Greenland.

Think about this: to date, only three countries have been able to put a man merely in Earth orbit – the United States, Russia, and China. That speaks to how difficult it is just to get into orbit.

Destiny Having explored the wonders of the solar system, Professor Brian Cox steps boldly on to an even bigger stage – the universe.