Working MST — Martian Standard Time

Mars Scientists Set Their Watches, and Lives, to Alien Clock

Mars as seen by Hubble.

A day on Mars is 39 minutes longer than a day on Earth. NASA hide caption

itoggle caption NASA

Working around the clock is tiring enough on Earth. But on Mars, it's even worse.

The martian day, called "Sol", is 39 minutes longer than a day on Earth. For NASA's two robotic rovers, the longer day makes little difference. But for scientists and engineers operating the rover, the longer day becomes a nightmare. NPR's Joe Palca explains why.

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