A deep pocket of hot, low-density material hiding in the Martian mantle may be responsible for gradually speeding up the planet’s spin, according to a peer-reviewed study that connects orbital gravity ...

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 ...

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.

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...