"Mutinous" is not a word frequently used to describe teams of NASA scientists and engineers.

But that's precisely the term employed by Harvard University sleep scientist Charles Czeisler to explain what happened when the group operating the Pathfinder mission's rover in 1997 was required to live indefinitely on Mars time.

"They didn't really have a plan for dealing with the Martian day before they went up, and the rover lasted a lot longer than it was supposed to, so they actually had a mutiny and wanted to shut the thing off because they were so exhausted," he says, drily adding the obvious: "NASA wasn't too happy with that notion."

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