The sight and sound of trillions of cicadas surfacing across much of America, a massive invasion of two separate groups called broods emerging at the same time, has scientists buzzing. For the first time in more than 200 years, two broods Brood XIX, known as the "Great Southern Brood," and Brood XIII, known as the "Northern Illinois Brood" will emerge from the ground simultaneously. While there is not extensive overlap between the two broods, some regions, especially in America's heartland
The sight and sound of trillions of cicadas surfacing across much of America, a massive invasion of two separate groups called broods emerging at the same time, has scientists buzzing. For the first time in more than 200 years, two broods Brood XIX, known as the "Great Southern Brood," and Brood XIII, known as the "Northern Illinois Brood" will emerge from the ground simultaneously. While there is not extensive overlap between the two broods, some regions, especially in America's heartland, will experience a double-whammy of cicada occupation, experts told ABC News.