On a time scale of tens to hundreds of millions of years, the geomagnetic field may be influenced by currents in the mantle. The frequent polarity reversals of Earth's magnetic field can also be ...

SANTA CRUZ, CA--The presence of magnetized rocks on the surface of the moon, which has no global magnetic field, has been a mystery since the days of the Apollo program. Now a team of scientists has ...

One of the abiding mysteries of our moon is why it apparently once had a magnetic field. Now two teams of scientists have offered two separate, but potentially complementary, explanations. When Apollo ...