.TYPE IS TREATING Americans to all type of eyeglasses. On April 8th thousands saw an overall sunlight eclipse. Numerous will certainly be less charmed when, in the coming days, mountains of cicadas seem in the country's Midwest and also south-east. The throng will definitely be abnormally big since 2 kinds of the bug-- Family XIII and also Brood XIX-- are developing simultaneously. The final time they seemed all at once was in 1803, when Thomas Jefferson was president. Why carry out the cicadas have such an unique life process?