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First audio recorded on Mars reveals two speeds of sound

First audio recorded on Mars reveals two speeds of sound

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The first audio recordings on Mars reveal a quiet planet with occasional gusts of wind where two different speeds of sound would have a strange delayed effect on hearing, scientists said Friday.

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After NASA's Perseverance rover landed on Mars in February last year, its two microphones started recording, allowing scientists to hear what it is like on the Red Planet for the first time.

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In a study published in the Nature journal on Friday, the scientists gave their first analysis of the five hours of sound picked up by Perseverance's microphones.

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The study confirmed for the first time that the speed of sound is slower on Mars, traveling at 240 meters per second, compared to Earth's 340 meters per second.

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But the scientists were surprised when the sound made by the laser took 250 meters a second—10 meters faster than expected.

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Future missions to Venus or Saturn's moon Titan could also now come equipped with microphones.

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