Comet water unlike Earth's

Scientists have long suspected that much of the water that fills our planet’s oceans may have come from asteroids or comets that collided with the early Earth. Now, recently reported data from the European Space Agency’s Rosetta mission, which landed its Philae probe on comet 67P/Churyumov-Gerasimenko in November, appears to favor an asteroid origin story for Earth’s water.

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Mary Caperton Morton

Mary Caperton Morton

Morton (https://theblondecoyote.com/) is a freelance science and travel writer based in Big Sky, Mont., and an EARTH roving correspondent.  

Sunday, May 10, 2015 - 06:00