The Dutch creators of a solar car -- that can travel 500 miles on a charge and reach 80 mph -- is on a U.S. tour.
Super villains aside, some have proposed blocking out the sun to curb global warming. But the U.N. may say no.
The cooling effect of the moon's shadow can cause atmospheric waves that travel about 100 meters (328 feet) per second.
The A-train of satellites monitoring Earth's equator is picking up a caboose.