Why carry out cicadas possess such a weird life cycle?

.CHARACTER IS ACTUALLY Caring For Americans to all type of eyeglasses. On April 8th millions saw a complete sun eclipse. A lot of will certainly be actually less mesmerized when, in the coming days, trillions of cicadas seem in the nation’s Midwest as well as south-east.

The swarm will definitely be actually abnormally large considering that 2 forms of the bug– Brood XIII and Brood XIX– are actually surfacing all at once. The final opportunity they appeared concurrently resided in 1803, when Thomas Jefferson was head of state. Why do the cicadas possess such an uncommon life cycle?