Zombie bees: A parasitic fly known as Apocephalus borealis can inject its eggs into a honeybee's abdomen, where the fly larvae mature. The parasitized bees abandon their hives and walk in circles — but eventually they fall over. "It really painted a picture of something like a zombie," says San Francisco State University's Andrew Core. About seven days after infection, the mature larvae burst out from the dead bees' bodies, renewing the gruesome circle of life. It gets worse: The zombie bees are spreading. Read more