Here's one of the cool things you learn when you land a seismometer on another planet: Mars's days are getting shorter. Or to put it another way, the planet is spinning faster. That was discovered ...

Mars has been considered a calm, or rather a ‘dormant’ planet, cold, dusty, and not very active in terms of geology. But recent scientific findings have managed to alter the way we view Mars in a ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists say they've come up with an explanation for the acceleration of Mars' rotation after spotting a "negative mass anomaly.