Pictograph of a Lion attack, Acacus, south west Libya, believed to have been painted around 9, 000 years ago. A dead auroch (a now extinct species) is depicted on it's back centre left, above which is the lion. A herdsman waves 2 sticks to protect other aurochs and cattle from further attacks. Painted with ochre this image displays remarkable artistic skill and stylistic invention. Pictographs of the husbandry of cattle are common throughout the Sahara and indicate a savannah environment during what was probably it's last wet phase. Most of the human figures in these cave paintings lack any facial features, the emphasis instead being placed on the shaping of the figures. Ochre was the main pigment used by early humans in rock art and body painting; and sites showing evidence of prehistoric ochre mining have been discovered in the Sahara.