A breakthrough simulation reveals how magnetars form and evolve, solving a key mystery about their magnetic origins.

The magnetic field is shown by lines with arrows that point from north to south. You can tell how old some coins are by testing them with a magnet. 5p and 10p coins made before January 2012 are ...

THE statement that “the mechanical force which urges a conductor carrying a current across the lines of magnetic force, acts, not on the electric current, but on the conductor which carries it ...