This belief, coupled with the staggering prices rhino horns command on the black market, fuels an illegal trade that spans continents and drives the brutal slaughter of these animals. The horns ...

They are different not in color but in lip shape. The black rhino has a pointed upper lip, while its white relative has a squared lip. The difference in lip shape is related to the animals' diets.

Global demand for the horns fuels both crude poaching networks in southern African countries (the heartland of the black rhino) and larger organised crime networks. Photojournalist Brent Stirton is ...