As demand for rhino horn increases - up 30 percent over the past 13 years - the wild rhino population dwindles. In fact, there are 90 percent less rhinos in the wild than in 1970, according to experts.
"In 2013, more than 2,000 rhinoceros horns from Africa were trafficked, which is 30 times more than in 2000," Celine Sissler-Bienvenu, director of the International Fund for Animal Welfare (IFAW) for France and French-speaking Africa, told reporters in Paris.
Sissler-Bienvenu said that the trade is "out of control," and relies on organized networks, according to Agence France-Presse. The horn, made of keratin (the same substance in our hair and nails), can sell for $35,000 per pound, on the black market in Asia, where it's thought to have medicinal powers - though scientific research has yet to prove this. (The U.S. has contributed to the trade as well.)