Lasers can tell time, shoot down missiles and power one heck of a TV. Now, scientists claim they can create rain clouds, too. Turning a 5-terawatt infrared laser on the sky in short, 100-femtosecond bursts, researchers at the University of Geneva managed to strip electrons from the surrounding air, causing the formation of "hydroxlyl radicals" and growing water droplets in their wake. Though some scientific peers believe the idea could never be used t
