.TYPE IS Caring For Americans to all sort of eyeglasses. On April 8th millions witnessed a complete photovoltaic eclipse. Many will be less mesmerized when, in the coming times, trillions of cicadas seem in the country's Midwest and south-east. The swarm will certainly be uncommonly large because pair of forms of the bug-- Family XIII and Brood XIX-- are actually emerging at the same time. The final time they showed up all at once was in 1803, when Thomas Jefferson was actually president. Why perform the cicadas possess such an unusual life cycle?