Long before humans became master hunters, our ancestors were already thriving by making the most of what nature left behind. New research suggests that scavenging animal carcasses wasn’t a desperate last resort, but a smart, reliable survival strategy that shaped human evolution. Carrion provided calorie-rich food with far less effort than hunting, especially during hard times, and humans were uniquely suited to take advantage of it—from strong stomach acid and long-distance walking to fire, tools, and teamwork.