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(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) It isn’t easy to figure out how the Earth was built, because it happened 4½ ...

Earth's tectonic history is what it is because of our planet's material composition. It's not like this on all planets, nor even all the rocky planets in our own solar system. However, the garnet ...

It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to watch. So scientists have had to look at what the Earth looks like now and ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) It isn’t easy to figure out how the Earth was built, because it happened 4½ ...

It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to watch. So scientists have had to look at what the Earth looks like now and ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) It isn’t easy to figure out how the Earth was built, because it happened 4½ ...