Which desert is known for its unique 'fairy circle' patterns and is considered one of the oldest deserts in the world?

1. It stretches along the Atlantic coast of Africa.
2. This desert is home to Welwitschia mirabilis, a plant with only two leaves that grow continuously.
3. It is largely uninhabited, with extremely arid conditions.
4. Its name comes from the Khoekhoe word meaning 'vast place'.