Walk together
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- Jun 25, 2021
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Do you think that the earth was hit by rocks that would make craters one to two thousand kilometers in diameter and then just vanish?Well, I've certainly learned something about you... the experts don't agree with your moon crater story.
"The bottom line is, everything that happened on the moon happened on the Earth,” said David Kring, crater expert and team leader for Center for Lunar Science and Exploration. “The Earth used to look just like that.”
But Earth has several things the moon doesn’t — an atmosphere and liquid water that cause erosion. And the trump card, plate tectonics, that recycles much of the planet’s crust over millions of years and smooths away blemishes left by cosmic impacts. As a result, there are only around 160 known impact craters in existence today (though there are surely more that haven’t been discovered)." How are craters formed?
A more specific version is here: The origin of the Moon's craters.
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