.STRUCTURE IS Curing Americans to all kinds of eyeglasses. On April 8th thousands watched a total solar eclipse. A lot of will be less charmed when, in the coming times, mountains of cicadas appear in the nation's Midwest and also south-east. The swarm is going to be abnormally large considering that pair of types of the insect-- Family XIII as well as Family XIX-- are actually surfacing simultaneously. The last time they appeared all at once remained in 1803, when Thomas Jefferson was actually president. Why carry out the cicadas have such an unique life process?