.NATURE IS ACTUALLY Caring For Americans to all sort of spectacles. On April 8th millions watched a total solar energy eclipse. Several will be actually much less mesmerized when, in the coming days, trillions of cicadas seem in the nation's Midwest as well as south-east. The flock will be actually uncommonly huge given that two kinds of the insect-- Brood XIII as well as Brood XIX-- are developing concurrently. The last opportunity they appeared simultaneously resided in 1803, when Thomas Jefferson was actually head of state. Why do the cicadas possess such an uncommon life process?