Giraffe up to , and can sustain for several kilometres. A giraffe rests by lying with its body on top of its folded legs. To lie down, the animal kneels on its front legs and then lowers the rest of its body. To get back up, it first gets on its knees and spreads its hind legs to raise its hindquarters. It then straightens its front legs. With each step, the animal swings its head. In captivity, the giraffe sleeps intermittently around 4.6 hours per day, mostly at night. It usually sleeps lying down, however, standing sleeps have been recorded, particularly
Giraffe deposits have been found in Libya. This animal was medium-sized, slender and antelope-like. "Giraffokeryx" appeared 15 mya in the Indian subcontinent and resembled an okapi or a small giraffe, and had a longer neck and similar ossicones. "Giraffokeryx" may have shared a clade with more massively built giraffids like "Sivatherium" and "Bramatherium". Giraffids like "Palaeotragus", "Shansitherium" and "Samotherium" appeared 14 mya and lived throughout Africa and Eurasia. These animals had bare ossicones and small cranial sinuses and were longer with broader skulls. "Paleotragus" resembled the okapi and may have been its ancestor. Others find that the okapi lineage diverged earlier,