The giant anteater (Myrmecophaga tridactyla), also known as the ant bear, is a large insectivorous mammal native to Central and South America. It is one of four living species of anteater and is classified with the sloths in the order Pilosa. This species is the most terrestrial of the living anteaters, unlike its arboreal or semi-arboreal cousins. Its evolution may have been influenced by the expansion of savannas in South America.
Video - "Probing Platypus Evolution": National Geographic researchers are trying to collect DNA samples from these odd duck-billed, egg-laying mammals to determine whether there are separate subspecies.