Blue Flower

After scouring 100,000 galaxies, scientists say that 50 are emitting unusally high levels of radiation which could hint at alien civilizations.

A team of scientists at Penn State Universityin the US, has been studying observations from Nasa’s WISE orbiting observatory looking for traces of the huge energy produced by technologies from sophisticated extra-terrestrial races.

Just as Earth sends heat and light into space, researchers say a similar signature should be emitted by other advanced civilisations.

And after scouring 100,000 galaxies they have come across 50 which hold promise.

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