Computer-generated image of the Milky Way galaxy
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Prof Brian Cox: Are we alone in the Milky Way?

The third programme of Brian Cox's series Human Universe is on BBC 2 on Tuesday night.

In it, Prof Cox will be asking the question: Is there anybody out there? Prof Cox discusses whether life here on Earth is unique within the Milky Way and what this might mean.

First broadcast on the Today programme on 20 October 2014