.NATURE IS Curing Americans to all type of spectacles. On April 8th millions observed a complete photovoltaic eclipse. Several will certainly be actually less mesmerized when, in the coming days, trillions of cicadas seem in the country's Midwest and also south-east. The flock will definitely be extraordinarily huge considering that two sorts of the pest-- Brood XIII as well as Brood XIX-- are developing concurrently. The final time they seemed together was in 1803, when Thomas Jefferson was president. Why perform the cicadas have such an unusual life process?