Tag: Water world
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Nation & World
Earth may have been a water world 3 billion years ago
A new study suggests Earth’s primordial ocean 3 to 4 billion years ago may have been much larger than it is today, and possibly covered the entire planet.
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Nation & World
In distant space, a water world
Observations by NASA’s Hubble Space Telescope have added a new type of planet to the mix. By analyzing the previously discovered world GJ1214b, astronomer Zachory Berta of the Harvard-Smithsonian Center for Astrophysics and colleagues proved that it is a water world enshrouded by a thick, steamy atmosphere.