Add Yahoo as a preferred source to see more of our stories on Google. Laboratory experiments reveal that silicon and carbon mixed into iron could explain why seismic waves behave differently across ...

Like Earth, Mars once had a strong magnetic field that shielded its thick atmosphere from the solar wind. But now only the magnetic imprint remains. What's long baffled scientists, though, is why this ...

First ever supercomputer simulations of Mars with a fully molten core could explain the Red Planet's unusual magnetic field. Billions of years ago, Mars had an active magnetic field. Mysteriously, its ...