A team of British scientists is convinced it has found proof of alien life, after it harvested strange particles from the edge of space.

The scientists sent a balloon 27km into the stratosphere, which came back carrying small biological organisms which they believe can only have originated from space.

Professor Milton Wainwright told The Independent that he was "95 per cent convinced" that the organisms did not originate from earth.

"By all known information that science has, we know that they must be coming in from space," he said. "There is no known mechanism by which these life forms can achieve that height. As far as we can tell from known physics, they must be incoming."

Some of the samples were captured covered with cosmic dust, adding further credence to the idea that they have originated from space.

"The organisms are not usual," said Professor Wainwright, who works at the University of Sheffield’s Department of Molecular Biology and Biotechnology. "If they came from earth, we would expect to see stuff that we find on earth commonly, like pollen."

Cool.