Humans have traveled to a different planet and started living on it abandoning earth and leaving all animals 1/2 of earth is a desert, and the other half is a jungle with cities and other man-made stuff gone or overrun by plants and animals…… many animals have evolved to fit the new climate, but not all…. Choose to be an evolved animal or a regular animal or the last human! Pigeons were the new humans…. live in a abandoned city or other choose to live in desert or jungle side of earth