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Why do we think mercury has so many tremendous cliffs?

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They were probably formed by tectonic stresses when the entire planet shrank as its core cooled. C) They probably formed when a series of large impacts hit Mercury one after the other. They were probably formed by tectonic stresses when the entire planet shrank as its core cooled. read more

A) They were probably carved in Mercury's early history by running water. B) They were probably formed by tectonic stresses when the entire planet shrank as its core cooled. C) They probably formed when a series of large impacts hit Mercury one after the other. read more

The cliffs, or scarps, that have been found on Mercury are unlike any of the other planets in the solar system. NASA scientists believe that they formed when the center of the planet cooled, causing it to shrink, creating the cliffs. read more

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