On a sunny morning outside a hospital in western Kenya, 20 or so mothers sit on wooden benches with babies in their arms. Wrapped in colorful blankets and kitenge pattern cloths, one by one the babies are injected with a shot. And one by one, they cry. Pole baby—sorry, baby—says the nurse. But the prick…

In 1997, clouds of smoke hung over the rainforests of Indonesia as an area roughly the size of Pennsylvania was burned to make way for agriculture, the fires exacerbated by drought. Smothered in haze, the trees couldn’t produce fruit, leaving resident fruit bats with no other option than to fly elsewhere in search of food,…