Believe it or not, the fact that iguanas are falling from the sky in Florida this week is not a sign that the apocalypse is upon us. As The New York Times reports, the cold-blooded reptiles are known to "freeze up" when temperatures get too cold; as their bodies turn rigid, many of them lose their perch up in trees and fall to the ground. While this phenomenon has been freaking out some residents of Florida as temperatures dip into the 30s and 40s, don't worry: They're not dead and they come "back to life" once things warm up. Experts say not to touch them in the meantime. Explains Kristen Sommers of the Florida Fish and Wildlife Conservation Commission, "Like any wild animal, it will try to defend itself."