Colorful rock art of domesticated cattle decorates a wall at Wadi Imha in the Tadrart Acacus Mountains in the Libyan Sahara. Images like this reveal the importance of cattle to Neolithic African ... more 
Colorful rock art of domesticated cattle decorates a wall at Wadi Imha in the Tadrart Acacus Mountains in the Libyan Sahara. Images like this reveal the importance of cattle to Neolithic African people. less 
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LiveScience.com | Photo By Roberto Ceccacci, © The Archaeological Mission in the Sahara, Sapienza University of Rome
Wed, Jun 20, 2012 1:30 PM EDT