Sixteen US states, stretching from Maryland to Oklahoma and Illinois to Alabama, are bracing for the arrival of trillions of noisy cicadas. What makes the event especially rare is that two broods are emerging simultaneously. Broods are Broods VIII, with three species and Brood IX, with four species. This rare coincidence happened 221 ago in 1803, but won’t be repeated until 2245.
More information can be found here
