No, Brian Cox does not think we are truly alone in the universe

Professor Brian Cox's Human Universe series on BBC2 is premised on the assertion that humanity is the only advanced technological civilisation in our galaxy (the Milky Way).

He explains that two freak occurrences - the initial merging of two cells and the meteor that wiped out the dinosaurs - led to human domination of the planet and theoretically the galaxy.

It's a dizzying thought. There are billions of planets out there, surely there must have been a second genesis?

But we must be careful because the story of life on this planet shows that the transition from single-celled life to complex life may not have been inevitable.

  • Brian Cox, Human Universe
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