.STRUCTURE IS Curing Americans to all kinds of spectacles. On April 8th millions watched an overall photo voltaic eclipse. Lots of will definitely be actually less magnetized when, in the coming times, mountains of cicadas show up in the nation's Midwest as well as south-east. The flock will be unusually large considering that two sorts of the bug-- Family XIII and also Brood XIX-- are arising all at once. The last time they appeared simultaneously was in 1803, when Thomas Jefferson was actually head of state. Why perform the cicadas possess such an unique life process?