Is there a rival in the Grand Canyon?

Yes, this is a canyon on Mars! The surface of Mars is less subject to different influences than the earth's. There are no rains or rivers there. However, although Mars is half the Earth, it has an Olympus Volcano 24 km long, three times higher than the Chomolungma. The Mariner 9 spacecraft opened the deep diva on Mars, called the Mariner valley . Its length is 4000 km, and the depth is four times greater than the depth of the Great Canyon in America.

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