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The floor is lava: after 1.5 billion years in flux, here’s how a new, stronger crust set the stage for life on Earth – The Conversation AU

In what could be described as a rather difficult adolescence, Earth earliest continents remained in flux — disappearing and reappeared over 1.5 billion years before…

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Our planet is unique in the Solar system. Its the only one with active plate tectonics, ocean basins, continents and, as far as we know, life. But Earth in its current form is 4.5 billion years in the making; its starkly different to what it was in a much earlier era.
Details about how, when and why the planets early history unfolded as it did have largely eluded scientists, mainly because of the sparsity of preserved rocks from this geological period.
Our research, published today in Nature,…

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