National Geographic on Instagram: "When billions of cicadas emerge from the ground this spring in the U.S., many will be the unwitting hosts of this fungus that eats them from the inside out and turns them into sex-crazed zombies. The parasitic Massospora fungus is waiting to infect them, take over their bodies, and keep them just alive enough to spread the disease to their mates during reproduction. Find out more at the link in our bio. Host: @sarahgibbens"