.NATURE IS ACTUALLY TREATING Americans to all kinds of eyeglasses. On April 8th thousands experienced an overall sunlight eclipse. Several will certainly be less magnetized when, in the coming days, mountains of cicadas seem in the nation's Midwest as well as south-east. The throng will be actually unusually sizable considering that 2 kinds of the pest-- Brood XIII as well as Brood XIX-- are emerging at the same time. The final time they showed up concurrently was in 1803, when Thomas Jefferson was president. Why do the cicadas possess such an unusual life process?