.NATURE IS Curing Americans to all sort of eyeglasses. On April 8th millions witnessed an overall photo voltaic eclipse. Several are going to be actually much less magnetized when, in the coming days, mountains of cicadas appear in the nation's Midwest and south-east. The swarm will definitely be actually unusually sizable due to the fact that pair of sorts of the bug-- Family XIII as well as Brood XIX-- are arising concurrently. The final time they seemed at the same time was in 1803, when Thomas Jefferson was actually head of state. Why perform the cicadas possess such an uncommon life process?