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.

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