When did the Namib Desert begin forming?

The Namib Desert began forming in stages over tens of millions of years, making it one of the oldest deserts in the world. Its arid climate developed as the region became influenced by the cold Benguela Current along southwestern Africa. The Namib stretches along the coast of Namibia and parts of Angola and South Africa. It is famous for huge dunes, some of which rank among the tallest on Earth. Its long stability has made it a unique environment for specialized desert life.