Earth Rare Among Exoplanets, Says Astronomers

Partial, Earth-like surface ice was present on only about 10% of hypothetical, habitable exoplanets

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Bern ,Switzerland ,Caitlyn Wilhelm ,Rory Barnes ,Russell Deitrick ,University Of Washington ,Uw Department Of Astronomy ,Uw Virtual Planetary Laboratory ,University Of Bern ,Virtual Planetary Laboratory ,Planetary Science Journal ,Virtual Planetary ,For Earth Like ,North Pole ,