Geologists have a new window onto the early Earth: zircon crystals from South Africa that could be as much as 4.1 billion years old #ResearchHighlight https://go.nature.com/2Rfll8z 

16:07 EDT 2 Oct 2018 | Nature Publishing

Geologists have a new window onto the early Earth: zircon crystals from South Africa that could be as much as 4.1 billion years old #ResearchHighlight https://go.nature.com/2Rfll8z 

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