A black rhino which has been killed by poachers in Etosha National Park, Namibia, June 1989. The rhino horn is sold to dealers in the far east where it is believed to be an aphrodisiac. (Photo by Tom Stoddart/Hulton Archive/Getty Images)
A black rhino which has been killed by poachers in Etosha National Park, Namibia, June 1989. The rhino horn is sold to dealers in the far east where it is believed to be an aphrodisiac. (Photo by Tom Stoddart/Hulton Archive/Getty Images)