.TYPE IS TREATING Americans to all type of eyeglasses. On April 8th thousands witnessed a complete solar energy eclipse. Many will be actually much less knocked out when, in the coming times, mountains of cicadas seem in the nation's Midwest and also south-east. The throng is going to be actually abnormally big since two kinds of the pest-- Brood XIII and also Family XIX-- are actually emerging simultaneously. The last opportunity they showed up all at once was in 1803, when Thomas Jefferson was actually president. Why carry out the cicadas have such an unique life cycle?