.CHARACTER IS TREATING Americans to all kinds of spectacles. On April 8th millions witnessed an overall sun eclipse. Several will be much less knocked out when, in the coming days, mountains of cicadas appear in the nation's Midwest as well as south-east. The throng is going to be actually uncommonly sizable because 2 kinds of the pest-- Brood XIII and Family XIX-- are actually surfacing concurrently. The last opportunity they appeared all at once remained in 1803, when Thomas Jefferson was head of state. Why do the cicadas possess such an unusual life process?