.NATURE IS TREATING Americans to all sort of eyeglasses. On April 8th thousands experienced a total sunlight eclipse. Numerous are going to be actually less knocked out when, in the coming days, mountains of cicadas seem in the nation's Midwest and also south-east. The flock will be actually abnormally huge due to the fact that 2 kinds of the bug-- Brood XIII and Brood XIX-- are surfacing at the same time. The last opportunity they showed up at the same time remained in 1803, when Thomas Jefferson was president. Why carry out the cicadas have such an unique life process?