.NATURE IS ACTUALLY Attending To Americans to all kinds of eyeglasses. On April 8th millions watched an overall sunlight eclipse. A lot of will be less mesmerized when, in the coming times, mountains of cicadas seem in the country's Midwest and south-east. The flock will definitely be uncommonly huge since 2 types of the insect-- Brood XIII and also Family XIX-- are arising simultaneously. The final time they seemed simultaneously was in 1803, when Thomas Jefferson was president. Why perform the cicadas have such an uncommon life cycle?