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Scientists have calculated just how much faster clocks tick on Mars

By Megan Lim,

Christopher Intagliata, Scott Detrow

Published December 9, 2025 at 4:05 PM EST

Clocks tick faster on Mars than they do on Earth, in part because Mars experiences less gravitational pull from the Sun. Now scientists have calculated just how much faster -- 477 microseconds, on average.

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