THE ANSWER According to the Nature Conservancy, Brood X will see trillions of periodical cicadas in 15 states, including “parts of Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Minnesota, North Carolina, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and Washington, D.C.” There are 15 broods, or groupings, of periodical cicadas in the eastern United States. “Twelve of those are 17-year cicadas, and three are 13-year cicadas, but they’re designated by Roman numerals,” according to Dr. Paula Shrewsbury, professor of entomology at the University of Maryland. THE QUESTION THE ANSWER George Washington University Postdoctoral scientist Zoe Getman-Pickering told WUSA’s VERIFY team in April that Brood X cicadas will begin to emerge at night near the beginning of May.