Thursday, January 9, 2014

Super Earths

Most scientists have assumed super Earths-- worlds slightly more massive than our own-- would essentially be water worlds.  Crushing gravity, they reasoned, would inhibit land formation.  Such ocean worlds might harbor life, but probably not civilizations.

A new study, however, suggests that if such a world had plate tectonics, much of the water present could be taken into the mantle, as happens here, and continents could form.

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