.TYPE IS ACTUALLY TREATING Americans to all sort of eyeglasses. On April 8th thousands saw an overall solar energy eclipse. Several will be actually much less knocked out when, in the coming days, trillions of cicadas show up in the nation's Midwest and also south-east. The throng will be uncommonly huge considering that pair of sorts of the pest-- Family XIII and also Family XIX-- are surfacing all at once. The last opportunity they seemed concurrently was in 1803, when Thomas Jefferson was actually head of state. Why perform the cicadas have such an unusual life process?