A distant Earth-like exoplanet 'could have life'
Astronomers have detected an Earth-like exoplanet that may have just the right kind of conditions to support life.
Gliese 581g lies some 20 light-years away in its star's "Goldilocks zone" - a region surface temperatures would allow the presence of liquid water.
Scientists say that the newly found world could also potentially have an atmosphere.
Pallab Ghosh reports.