> If you haven't seen them yet, you may have heard them: the periodical cicadas that are out in full force in nearly 20 U.S. states across the Southeast and Midwest.
These 17 states, which range from Oklahoma to Wisconsin to North Carolina and more, are seeing the trillions of cicadas emerging this year in a rare, double brood event.
The two broods this year, the 13-year Brood XIX located mainly in the Southeast and the 17-year Brood XIII in the Midwest, have not emerged together in 221 years and are not expected to do so again until 2245.