Today"s lungfish live mostly in Africa and South America. When the water level falls and a river dries up, these fish survive by burying themselves in the mud. The oldest known fossil of a lungfish dates from the Devonian period (417 to 354 million years ago). The fossil pictured also dates back to this period. There is no difference between a lungfish of today and one that lived 350 million years ago. These fish have not changed in hundreds of millions of years and offer proof that living creatures did not evolve, they were created.