The book of Revelation prophesies that, prior to the return of Jesus Christ, animals will cause death and devastation. The four prophetic seals opened by Jesus Christ, picturing the famous “four horsemen of the apocalypse,” will bring death to up to one-quarter of mankind. This death will come through warfare, hunger and disease, and from “the beasts of the earth” (Revelation 6:1–8). But how might animals cause such widespread death and destruction?