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Human Universe: How astronauts return to Earth?

October 7, 2014 Last updated at 10:06 BST

A new BBC series in five games, the human world begins on Tuesday evening in which Professor Brian Cox explores some of the deepest questions ever asked: Why are we here? As we have the universe? What is the universe? Are we alone? And what is our future?

In the first episode, it is moved from the Rift Valley in Ethiopia in the ancient city of Petra in Jordan, and ends in the steppe of Kazakhstan.

It joins a search and rescue mission in the depths of winter and collecting two cosmonauts and an astronaut when they reach Earth, after months of living on board the International Space Station.

Watch the first episode of the 21 human consumption: 00BST Tuesday, October 7th on BBC Two.