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Origin of Earth's Water: "Part of Our Planet from the Beginning"

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http://www.dailygalaxy.com/my_weblog/201...nning.html

EXCERPT: Water covers more than two-thirds of Earth’s surface, but its exact origins are still something of a mystery. Scientists have long been uncertain whether water was present at the formation of the planet, or if it arrived later, perhaps carried by comets and meteorites. Now researchers from the University of Hawaiʻi at Mānoa, using advanced ion-microprobe instrumentation, have found that rocks from Baffin Island in Canada contain evidence that Earth’s water was a part of our planet from the beginning....
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