Sadly, there are millions of humans who want to see rhinos dead. Most of them are in the Far East. Humans who think the horn of the white or black rhino can be ground down and ingested to improve their sex lives, cure cancer or ward off evil spirits. Humans who are prepared to pay heavily-armed poachers to shoot and maim these animals, hack off their horn and ship it half way around the world to China. It's the new drug trade in Africa, a multi-million dollar industry that commands $65,000 a kilo for rhino horn. An average rhino horn is about 5kg. It's not hard to do the maths.