.NATURE IS Attending To Americans to all kinds of eyeglasses. On April 8th thousands witnessed an overall solar eclipse. Numerous will certainly be actually much less knocked out 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 given that two types of the bug-- Brood XIII and also Brood XIX-- are actually arising all at once. The final opportunity they showed up simultaneously was in 1803, when Thomas Jefferson was head of state. Why perform the cicadas possess such an unique life process?