AEST 12:00, Fri Nov 29 2013
Aliens are living above the clouds, a team of British scientists says.
University of Sheffield researchers launched a balloon 27km into the stratosphere on July 31, using microscopic studs to act as a kind of "fly paper" to harvest samples from the edge of space.
When the balloon landed, it had carried back small biological organisms.
Professor Milton Wainwright said he was "95 per cent convinced" they originated from space.
"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," he said.
The team's findings are published in the Journal of Cosmology.
Scientists believe this microscopic diatom fragment was released from a passing comet.