3 Billion Years Ago, the World Might Have Been a Waterworld, With No Continents At All

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Evidence from an ancient section of the Earths crust suggest that Earth was once a water-world, some three billion years ago. If true, itll mean scientists need to reconsider some thinking around exoplanets and habitability. Theyll also need to reconsider the… [+7195 chars]Source

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