A newly emerged Brood X cicada flies away as it is freed by Chris Simon, an evolutionary biologist at the University of Connecticut, during a field trip to map out and collect samples near Blairsville, Georgia, U.S., May 22, 2021. "As the climate gets warmer, you get a longer growing season. And if you get a longer growing season, the cicadas can get bigger every year," Simon says. "So there's more ready to come out four years early." REUTERS/Carlos Barria SEARCH "CICADAS BARRIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES