.NATURE IS ACTUALLY TREATING Americans to all sort of eyeglasses. On April 8th thousands observed a complete solar energy eclipse. Many will definitely be less mesmerized when, in the coming days, mountains of cicadas appear in the country's Midwest and south-east. The flock is going to be unusually sizable given that pair of sorts of the bug-- Brood XIII and also Brood XIX-- are emerging all at once. The last opportunity they showed up simultaneously resided in 1803, when Thomas Jefferson was actually president. Why do the cicadas possess such an unusual life process?