Do foxes use a "magnetic sense" to hunt in the winter snow?

Finding food can be especially tough in winter, when the snow is deep and the prey is hidden. So foxes have developed a special technique: they dive headfirst through three feet of snow to find their unseen prey. Amazingly, this works — but only when the fox is facing northeast or southwest. » 1/03/14 12:50pm 1/03/14 12:50pm

Astronomers discover an insanely strong magnetic field

The dead core of a once massive star is producing one of the most powerful magnetic fields ever recorded by scientists. Measuring a mere 12 miles across, the "magnetar" is exerting a force 20 trillion times stronger than a fridge magnet. » 8/15/13 8:00am 8/15/13 8:00am

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