Bungee jumping has been around for ages. The land divers of Vanuatu tied vines around their ankles. The first modern-style jump with elastic cords was undertaken in Bristol, England, in 1979 by the ...

Astrophysical plasmas have the remarkable ability to preserve magnetic topology, which inevitably gives rise to the accumulation of magnetic energy within stressed regions including current sheets.

Linear motors are becoming increasingly practical for general motion. Many are used for long strokes of a few feet or more. One new design, however, where the magnets move relative to a stationary ...