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.

"The chief aim of Save the Rhino Trust is to protect the black rhinoceros from poachers," says Lesley Karutjaiva, the 47-year-old head of the group's base in Palmwag in north-western Namibia. It is ...

Sadly, humans are the number one predator of rhinos. Poachers kill rhinos for their horns, which they sell on the black market. There are only two northern white rhinos left in the world ...