Study Suggests Magnetic Fields Can Control Heat And Sound

More than a hundred years ago, physicists discovered that heat is simply the energy stored in the vibrations of atoms. This meant that heat and sound are related. Now, for the first time ever, scientists have experimentally shown that these atomic vibrations have magnetic properties, too. » 3/25/15 11:40am 3/25/15 11:40am

The Asteroid that Killed the Martian Magnetic Field

Click to viewOne of the many mysteries of Mars is how the planet lost its magnetic field 4 billion years ago. Evidence suggests the planet once had a magnetic field just like Earth's, created by a churning molten dynamo in the planetary core. But what could have caused that core to stop spinning, and stop generating a… » 7/20/08 2:00pm 7/20/08 2:00pm