Rhino horn is a solid structure made primarily of keratin, the same protein found in human hair and nails. It grows on the snouts of various species of rhinoceros, including the white rhino and black rhino. Unlike true horns, which are bony, rhino horns are composed of tightly packed hair-like fibers. Rhino horn has been used in traditional medicine and as a status symbol in some cultures, leading to illegal poaching and a significant decline in rhinoceros populations. Conservation efforts are ongoing to protect these animals and combat the illegal wildlife trade associated with rhino horn.