Image for Are we alone in the universe?

Are we alone in the universe?

Duration: 07:13

Brian Cox and Charles Dance demonstrate how light sources in the universe are detected.

Available since: Mon 10 Mar 2014

This clip is from

The Science of Doctor Who

Professor Brian Cox takes an audience on a journey into the universe of the Doctor.

First broadcast: 14 Nov 2013

Image for The Science of Doctor Who Not currently available on BBC iPlayer

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