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What have the Mars rovers discovered about Mars?

A. The crust of Mars contains 2 chemical elements never discovered before.
B. It had similar volcano activity and crust composition to Earth.
C. It has polar ice caps that could become an ocean if Mars were to warm up in the future.
D. The atmosphere of Mars is twice as thick as scientists predicted it would be.

1 Answer

11 votes

Answer:D. The atmosphere of Mars is twice as thick as scientists predicted it would be.

Explanation:

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