This podcast episode explores the ancient Zoroastrian practice of sky burials and the mysterious decline of vulture populations in India and Pakistan. The disappearance of vultures, nature's immune system, has had devastating environmental and cultural consequences. Through the investigation of wildlife biologist Munir Virani, the culprit is identified as diclofenac, a painkiller used in cattle that is toxic to vultures. The episode also examines the drawbacks and ethical considerations of NSAIDs and discusses alternative pain management strategies. Furthermore, it delves into the changing death rituals of the Parsi community in response to the vulture decline, highlighting the interplay between culture and ecological changes.