.STRUCTURE IS ACTUALLY TREATING Americans to all kinds of eyeglasses. On April 8th thousands witnessed a complete sunlight eclipse. Several will certainly be actually much less magnetized when, in the coming days, trillions of cicadas show up in the nation's Midwest and south-east. The throng will definitely be abnormally huge because two kinds of the pest-- Brood XIII as well as Brood XIX-- are actually developing simultaneously. The final opportunity they showed up at the same time remained in 1803, when Thomas Jefferson was actually president. Why perform the cicadas possess such an unusual life process?