Did aliens start life on Earth? New study makes surprising claims.
Habitable: Aliens could have started life on Earth, scientists claim.
Could aliens have started life on Earth?
New research shows life may have spread through space like an infectious virus - ending up with us here on Earth, scientists claim.
The alien life forms may have swept from planet to planet creating the seeds of new species wherever they found a habitable environment.
Co-author Dr Avi Loeb, also from the CfA, said: "Life could spread from host star to host star in a pattern similar to the outbreak of an epidemic.
"In a sense, the Milky Way galaxy would become infected with pockets of life."
Such an epidemic-like pattern should be possible to identify from Earth.
For example, if the Earth happened to be on the edge of a "bubble" of life, all the nearby life-hosting worlds would be in one half of the
