.TYPE IS ACTUALLY Caring For Americans to all kinds of eyeglasses. On April 8th millions watched a complete sunlight eclipse. Lots of will be actually less mesmerized when, in the coming days, mountains of cicadas show up in the country's Midwest and south-east. The flock is going to be abnormally huge due to the fact that 2 sorts of the pest-- Brood XIII and also Family XIX-- are actually emerging all at once. The final time they seemed all at once was in 1803, when Thomas Jefferson was actually head of state. Why perform the cicadas have such an unusual life cycle?