The horns of rhinoceroses are made primarily of keratin, the same material found in human hair and nails. The horns are not made of bone, as is often mistakenly believed. Keratin is a tough and fibrous protein that forms the structural component of the rhino horn. It grows continuously throughout the rhino's life, much like human hair and nails.
The composition of a rhino horn is similar to that of other keratin structures in animals. It is composed of compacted keratin fibers that are tightly packed together, giving the horn its hardness and durability. The exact structure and composition can vary slightly between rhino species, but all rhinoceros horns share the common trait of being predominantly composed of keratin.
Rhinoceros horns have unfortunately made them targets of illegal poaching due to the mistaken belief in some cultures that the horn possesses medicinal or aphrodisiac properties. However, it is important to note that there is no scientific evidence to support these claims, and the trade in rhino horn is illegal in most countries due to conservation efforts to protect these endangered animals.