4,000-year-old rock art of boats and cattle unearthed in Sud

Thousands of years ago, a large swath of the Sahara may have been a green grassland ideal for raising cattle.

Related Keywords

Sydney , New South Wales , Australia , Eastern Desert , Al Bar Ala Mar , Egypt , Nile River , Egypt General , Sudan , Atbai , Lake Nubia , Ash Shamaliyah , Nubia , Julien Cooper , Macquarie University , Live Science , North Africa ,