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Which of the following was NOT a discovery by the Mars rovers? A. Mars has a crust similar to Earth's. B. Volcanoes played an important role in the formation of Mars. C. The surface of Mars shows erosion
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Which of the following was NOT a discovery by the Mars rovers?

A. Mars has a crust similar to Earth's.
B. Volcanoes played an important role in the formation of Mars.
C. The surface of Mars shows erosion by floods and winds at one time in its history.
D. The atmosphere of Mars contains more oxygen than Earth's atmosphere.

User Cris Towi
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D. The atmosphere of Mars contains more oxygen than Earth's atmosphere.

User Dylan Maxey
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