Recent observations of a Sumatran orangutan treating its wound with a medicinal plant echo ancient reports of animals self-medicating. Historically, Aristotle, Pliny, and others documented various animals using plants for healing. Bears, deer, elephants, and birds exhibit this behavior, using plants like garlic, bay leaves, and olive leaves to heal wounds or counteract toxins. This ancient wisdom, though based on folk knowledge, hints at potential medicinal discoveries. Today, the study of animal self-medication is a burgeoning field, offering insights into nature’s pharmacopoeia and potential new therapies.