John Valley on the Early Earth
The Earth was formed just over 4.5 billion years ago. What happened just after it formed and what were conditions like then? John Valley reveals what we have managed to discover about our planet’s very distant past, and how we did it.
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The Earth was formed just over 4.5 billion years ago. What happened just after it formed and what were conditions like then? John Valley reveals what we have managed to discover about our planet’s very distant past, and how we did it.
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