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Comets Didn't Deliver Earth's Water鈥擴ntil Now
The Herschel Space Observatory discovered that Comet Hartley 2's water vapor matches Earth's oceans' deuterium-to-hydrogen ratio almost exactly鈥攔eversing 20 years of scientific consensus that asteroids brought our water. #comet #earthwater #astronomy #science #spaceobservatory #herschel #geology #oceanorigin #scientificdiscovery #space #Shorts
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