Artist's impression of Kepler 186f
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'Most Earth-like planet yet' spotted by Kepler

18 April 2014 Last updated at 04:39 BST

The most Earth-like planet yet has been discovered, scientists report in the journal Science.

The rocky planet, dubbed Kepler 186f, is close to the size of Earth.

At about 10% bigger scientists say it may well have liquid water - a key ingredient for life - on its surface.

Tim Allman reports.