Why carry out cicadas have such a strange life process?

.TYPE IS ACTUALLY Caring For Americans to all kinds of spectacles. On April 8th millions experienced a complete sunlight eclipse. Several will be actually less mesmerized when, in the coming times, trillions of cicadas appear in the nation’s Midwest as well as south-east.

The throng will certainly be actually extraordinarily huge given that two sorts of the pest– Family XIII and Family XIX– are actually arising simultaneously. The last time they seemed all at once remained in 1803, when Thomas Jefferson was president. Why perform the cicadas have such an unusual life cycle?