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Prof Chandra Wickramasinghe, of Cardiff University, said new research "overwhelmingly" supported the view that human life started from outside our Earth. The Astrobiologist said the first "seeds of life" were deposited on our plant from space 3,800m years ago. He claimed microbes from outer space arrived on earth from comets, which then "multiplied and seeded" to form human life.
His said his evidence, published in Cambridge University's International Journal of Astrobiology, showed humans, and all life on Earth, came from aliens brought to the earth by comets hitting the planet. "Yes, we are all aliens – we share a cosmic ancestry," Prof Wickramasinghe said.
"Each time a new planetary system forms a few surviving microbes find their way into comets. "These then multiply and seed other planets."
He added: ""We are thus part of a connected chain that extends over a large volume of the cosmos. Evidence is pointing inexorably in this direction." Prof Wickramasinghe believes life is transferred from planet to planet over billions of years.
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