At the beginning of the 20th century there were 500,000 rhinos across Africa and Asia. This fell to 70,000 by 1970 and further to just 29,000 in the wild today. Rhinos have become endangered species because of massive poaching of their tusks..
East Asia, specifically Vietnam, is the largest market for rhino horns. By weight, rhino horns cost as much as gold on the black market. People grind up the horns and then consume them believing the dust has therapeutic properties.
The horns are made of keratin, the same type of protein that makes up hair and fingernails