Great Plains as strongly as periodic prairie fires and which were central to the survival of many Indigenous peoples of the Great Plains. To the corn-growing village people, it was a valued second food source. However, there is now some controversy over their interaction. Charles C. Mann wrote in 1491: New Revelations of the Americas Before Columbus, pages 367 ff, "Hernando De Soto's expedition staggered through the Southeast for four years in the early 16th century and saw hordes of people but apparently didn't see a single bison." Mann discussed the evidence that Native Americans not only created (by selective use of fire) the large grasslands that provided the bison's ideal habitat but also kept the bison population regulated. In this theory, it was only when the original human population was devastated by wave after wave of epidemic (from diseases of Europeans) after the 16th century that the bison herds propagated wildly. In such a view, the seas of bison herds that stretched to the horizon were a symptom of an ecology out of balance, only rendered possible by decades of heavier-than-average rainfall. Other evidence of the arrival circa 1550–1600 in the savannas of the eastern seaboard includes the lack of places which southeast natives named after buffalo. Bison were the most numerous single species of large wild mammal on Earth. Russel Means states that bison were killed by using a method that coyotes implemented. Coyotes will sometimes cut one bison off from the herd and chase it in a circle until the animal collapsed or gave up due to exhaustion. Working on foot, a few groups of Native Americans at times used fires to channel an entire herd of buffalo over a cliff, sometimes killing far more than they could use. The Olsen–Chubbuck archaeological site in Colorado reveals some techniques, which may or may not have been widely used. The method involves skinning down the back in order to get at the tender meat just beneath the surface, the area known as the "hatched area". After the removal of the hatched area, the front legs are cut off as well as the shoulder blades. Doing so exposes the hump meat (in the Wood Bison), as well as the meat of the ribs and the Bison's inner organs. After everything was exposed, the spine was then severed and the pelvis and hind legs removed. Finally, the neck and head were