.NATURE IS ACTUALLY TREATING Americans to all sort of spectacles. On April 8th millions saw a total sunlight eclipse. Many will definitely be less mesmerized when, in the coming times, mountains of cicadas show up in the nation's Midwest and south-east. The throng will definitely be unusually huge considering that two kinds of the pest-- Family XIII and also Brood XIX-- are emerging concurrently. The final time they appeared concurrently was in 1803, when Thomas Jefferson was president. Why do the cicadas possess such an uncommon life process?