.NATURE IS ACTUALLY Curing Americans to all kinds of eyeglasses. On April 8th millions witnessed a total sunlight eclipse. Numerous are going to be actually less charmed when, in the coming times, trillions of cicadas seem in the nation's Midwest and also south-east. The throng will certainly be unusually huge because 2 forms of the insect-- Brood XIII and Family XIX-- are actually developing concurrently. The final time they showed up together was in 1803, when Thomas Jefferson was actually head of state. Why do the cicadas possess such an uncommon life process?