The atmosphere of Mars is much less dense than the atmosphere of the Earth so the speed of sound on Mars is only 240 meters per second. Valles Marineris is a large canyon on Mars that at its widest part is 540 kilometers. If you were at the edge of Valles Marineris and yelled, “There’s no place like El Centro!”, how long would you have to wait to hear the echo?

The atmosphere of Mars is much less dense than the atmosphere of the Earth so the speed of sound on Mars is only 240 meters per second. Valles Marineris is a large canyon on Mars that at its widest part is 540 kilometers. If you were at the edge of Valles Marineris and yelled, “There’s no place like El Centro!”, how long would you have to wait to hear the echo?

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