The Rosetta spacecraft which landed on 67P /Churyumov-Gerasimenko last month has detected water which contains about three times more deuterium – a heavy form of hydrogen – than water we have on Earth. Epic Science!

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Scientists say this may mean that rather than comets carrying water to Earth as was once believed, it may have arrived via asteroids.

Comet 67P is believed to have come from the Kuiper belt, which is beyond the orbit of Neptune. Scientists will take more measurements from the comet as it nears the sun and starts to emit more water vapor into space.

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Watch this report on Rosetta's findings:

Read more here.

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