Invaders from underground are coming in cicada-geddon. It's the biggest bug emergence in centuries

Trillions of evolution’s bizarro wonders, red-eyed periodical cicadas, are about to emerge in numbers not seen in decades and possibly centuries. These cicadas are nature's kings of the calendar, crawling out from underground every 13 or 17 years and singing as loud as jet engines. An unusual double dose is about to hit big time, first in the South and then in Illinois and its neighbors. It's a combination of two separate broods not seen together since 1803. One biophysicist says the cicadas are like an entire alien species that lives beneath our feet, coming out to say hello in some prime-number years.