The Namib is a narrow coastal desert, located lengthways along the Atlantic Coast of South West Africa. The desert stretches for 1,900km incorporating countries such as Angola, Namibia and South Africa. It subsequently extends inland to meet the Kalahari Desert in Botswana. The Namib is thought to be the oldest continuous desert in the world, as it has endured an arid climate for 50 - 80 million years. This lengthy dry period influenced the evolution of endemic plants (e.g. Welwitschia) and animals (e.g. Barking Gecko).