What animal has valves that close its nose and ears when underwater uses its large front teeth to cut and chew wood?

The Kalahari is home to desert specialties such as meerkat, bat-eared foxes, cape fox and brown hyena. One of the more unexpected Kalahari Desert facts is that all three African big cats can be found here –cheetah, leopard and the famous black-maned Kalahari lions

The Kalahari Desert is inhabited primarily by Bantu speakers and Khoisan-speaking San, with a small number of Europeans