Kalahari

However, forty years ago, only two large intact wildebeest migrations remained in Africa: the famed Great Migration of the Serengeti-Mara and one in the Kalahari Desert of southern Africa.

The trees were discovered growing beneath the Kalahari sands of highland Angola, in central Africa.

These findings stem from a remarkable continuous decade-long field study of 40 family groups of sparrow weavers in the Tswalu Kalahari Reserve, South Africa.

Rain accumulates in the Angolan highlands, eventually flowing down into the main channel of the Okavango River in Namibia before spilling out across the Kalahari sands of northern Botswana.

This long, thin stretch of land and water opens into the world's largest inland delta, a green jewel in the Kalahari Desert.