Astronomers have claimed advanced alien life is possible in 50 galaxies.
Are alien out there?
Scientists at Penn State University in the US have studied 100,000 galaxies and have come across 50 which could host alien life.
Roger Griffith, a researcher at Penn State, said: ''We found about 50 galaxies that have unusually high levels of mid-infrared radiation.
''Our follow-up studies of those galaxies may reveal if the origin of their radiation results from natural astronomical processes, or if it could indicate the presence of a highly advanced civilisation.''