Strangers are more likely to return lost wallets containing photos of cute babies, according to British researchers. The scientists sprinkled 240 wallets across Edinburgh last year with pictures of either a smiling baby, a puppy, a “happy family,” or a “contended elderly couple.” It turns out nobody cares about your pooch, retired parents, or smugly superior family life. But that cute wittle baby? Apparently it triggers a “compassionate instinct towards vulnerable infants that people have evolved to ensure the survival of future generations.”