The planet Earth we live on today bears very few traces of its infancy. The 500 million years between Earth's formation around 4.5 billion years ago and 4 billion years ago – the Hadean eon – is ...
Earth is the only planet we know of with buoyant, silica-rich continents. But, despite decades of research, geologists still don’t agree on how they formed. “The continents started appearing around ...
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