.NATURE IS ACTUALLY TREATING Americans to all sort of eyeglasses. On April 8th thousands witnessed an overall photo voltaic eclipse. Numerous will be actually less magnetized when, in the coming days, mountains of cicadas seem in the country's Midwest as well as south-east. The swarm will definitely be actually abnormally sizable given that 2 forms of the pest-- Brood XIII and Brood XIX-- are actually surfacing concurrently. The final time they showed up at the same time remained in 1803, when Thomas Jefferson was head of state. Why perform the cicadas possess such an unusual life process?