Watch an avalanche inside a superconductor

The famous "superconductor monorail" was a wonderful visual demonstration of what superconductors do to magnets. At first, magnets are repelled by the superconductor. As the temperature drops, a superconducting material unceremoniously kicks magnetic fields out of its territory. If a magnet is forced close to a… » 3/27/12 4:10pm 3/27/12 4:10pm

Scientists learn the secret of a famous anti-superconductor

Magnetite is, as its name implies, one of the most naturally magnetic materials on earth. Millennia ago, it was what first clued scientists in to magnetism. But magnetite is also something of a mystery. At low temperatures, the rock completely stops all electricity. At last scientists have figured it out why. » 12/23/11 7:20am 12/23/11 7:20am