The black rhino now has less than 2,500 of its kind left in the world. This has dropped off drastically from the 65,000 existent in 1970. 90% of the species was killed off in the 70s. These animals weigh around 3,850 pounds each and have horns worth $50,000 (£31619) each. Hunters kill them for their horns. Although this is illegal, greed wins out over moral rights. The horns are made of keratin. Look at your fingernails. Your hair. Now a rhino horn. It's made of the same stuff. But anyway, a rhino is the #1 most endangered species in the world. We can help end that by signing this petition.