BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Gemsboks (Oryx gazella) at a waterhole. The two gemsboks here have the appearance of a two-headed animal. Also known as the African oryx, this large antelope eats grass and leaves and can go without water for long periods. Both the male and the female have horns, which are effective weapons. The gemsbok lives in savanna in parts of southern and eastern Africa. Photographed in Etosha National Park, Namibia.
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