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Space expert Brian Cox reckons there could be 200 billion alien civilisations in the universe.

The British rock star turned physicist said we might not be the only ones in the Milky Way.

He told the Sunday Mirror: "There have to be other civilisations in the universe. I can’t imagine we are the only one.

“Knowing what we know, it’s conceivable there are one or two civilisations in a galaxy at any one time."

“There’s certainly one in our galaxy. It’s us.”

Studies suggest there could be anywhere between 200 billion and two trillion galaxies along with our own Milky Way in the vast universe.

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