Humans have already found alien life – but not in the form of little green men.

The claim comes from the UK's Astronomer Royal, Lord Martin Rees. Writing for the BBC, Lord Rees claims that Artificial Intelligence is a form of alien life, and that it signals the end of humans reaching the peak of Darwinian evolution – and this could see our role as the dominant species no longer be the case.

He said: “It may be only one or two more centuries before humans are overtaken or transcended by inorganic intelligence. If this happens, our species would have been just a brief interlude in Earth's history before the machines take over. Many assume that human beings are the peak of intelligence, but it's possible that our species may represent a stage on the path towards minds that are more artificial.

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