The Brood X cicadas are done copulating and dying, and now their efforts are bearing fruit. Over the next month or two, trillions of cicadas will hatch – and they’ll be raining down from the trees. But they will be an invisible rain, given that they’re smaller than an ant and will be barely noticeable, biologist Dr. John Lill of George Washington University told WUSA-TV. Before that, they will incubate for six weeks inside the woody branches and twigs where they were laid, in order to escape predators in the soil. “Across their geographic range, trillions will fall out of...