By Richard I. Gibson
We tend to think of the early Earth as a hot place, and it was for the first few hundred million years of its history. But after the continents and oceans were more or less established, probably by around 3.8 billion years ago, recognizable surface climates also began.
Glacier photo by Richard Gibson.
Here's the podcast:
We tend to think of the early Earth as a hot place, and it was for the first few hundred million years of its history. But after the continents and oceans were more or less established, probably by around 3.8 billion years ago, recognizable surface climates also began.
Glacier photo by Richard Gibson.
Here's the podcast:
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