Such a privilege to work for these creatures every day. We have 5 black rhinos ranging in age from 1.5 years to 21 years, and each of them is so beautiful. Their horns are made of keratin - check your hair and nails, it’s the same thing - and because some cultures believe they have medicinal properties, they sell on the black market for more money than gold or cocaine. Black rhinos aren’t endangered because of a complex web of human needs. People don’t use them to create food or clothing or shelter. These 3,000-pound animals are killed by poachers, their horns are hacked off, and their bodies are left to rot, all so that someone can profit from the sale of the horn. This is the intensity of human greed, and it’s heartbreaking.