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Articles on Earth's crust

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An illustration shows how, about 65 million years ago, a large asteroid collided with Earth. It hit what is today Mexico and created the Chicxulub crater. Mark Garlick/Science Photo Library/Getty Images

Curious Kids: Why are there so few impact craters on Earth?

Impact craters are relatively shallow, so these bowl-shaped “dents” in Earth’s rocky crust can be easily buried or erased by erosion.
Earth crust cutaway. Jeremy Kemp

Meet the earthquakes that happen 600km underground

A little more than 90 years ago, British geologist Herbert Hall Turner noticed some earthquake data that suggested a surprising explanation. The only way to explain it was if the quake had occurred hundreds…

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