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March 17, 2021 Earlier studies have suggested the possibility that Earth was once covered with water. New evidence – focused on Earth’s mantle – suggests our planet was a true water world, covered by a global ocean, billions of years ago. Artist’s concept of a water-world planet. Image via Sci-News.com. Scientists theorize that some exoplanets – worlds orbiting distant suns – might be water worlds, rocky planets completely covered by global oceans. This month, a researcher at Harvard University published new evidence that Earth itself was once a water world, with its own global ocean and very little, if any, visible land. Planetary scientist Junjie Dong at Harvard is lead author on the new paper, which focuses on the amount of water present in Earth’s mantle, the layer of rock between our planet’s crust and core. These results were published on March 9, 2021, in the peer-reviewed journal

United statesAtlantic oceanThomas carellPaul voosenHarvard universityNasa jpl caltechseti instituteMichigan technological universityJunjie dong at harvard universityLudwig maximilian university of munichJunjie dongSouth americaMichigan technologicalArchean eonLudwig maximilian universityAncient earth water world global ocean harvardஒன்றுபட்டது மாநிலங்களில்