.NATURE IS Attending To Americans to all sort of spectacles. On April 8th thousands saw a complete solar eclipse. Numerous will certainly be less knocked out when, in the coming times, trillions of cicadas show up in the nation's Midwest as well as south-east. The swarm will be unusually sizable since pair of forms of the pest-- Family XIII and also Brood XIX-- are arising concurrently. The last opportunity they appeared together resided in 1803, when Thomas Jefferson was head of state. Why do the cicadas possess such an unusual life process?