I think it’s reasonable to assume that ever since the dawn of humankind, people have yearned to control lightning. (No, Halle Berry did not create this idea for her role in X-Men.) The first approach—rain dances, spells, and the like—proved marginally effective, at best, but there wasn’t much of an alternative. In the ’70s, scientists found out that if they launched rockets carrying long metal wires into thunderstorms, the wires would sometimes provide enough conductance to coax a lightning strike, much like Ben Franklin’s (probably apocryphal) kite string. But around the same time, they also thought it would be much, much cooler to use a laser to bring about lightning. Most things are cooler when accomplished by lasers, as any scientist can tell you.
A group of European researchers working at South Baldy Peak have finally realized this longstanding goal by successfully bringing about lightning by zapping lasers into thunderclouds in a recent experiment. The ultrashort laser bursts (only around a hundred femtoseconds) ionize some of the molecules in the air, forming a plasma, and these channels of plasma act can guide lightning strikes like the wires on a rocket. (more…)
