.NATURE IS Caring For Americans to all type of spectacles. On April 8th millions experienced a total solar energy eclipse. Many will certainly be actually less charmed when, in the coming days, mountains of cicadas show up in the nation's Midwest and also south-east. The flock will certainly be abnormally big given that two kinds of the bug-- Brood XIII as well as Brood XIX-- are actually developing simultaneously. The last opportunity they appeared together remained in 1803, when Thomas Jefferson was head of state. Why perform the cicadas have such an unusual life cycle?