What_Happened_To...

What Happened To... At one time the North American continent belonged to various forms of enormous, fantastic creatures. By the end of the Ice Age, most of these large animals had become extinct. There has yet to be a consensus among scholars as to what exactly can be blamed for this disappearance. Among the theories that have been debated, two are predominant; they are the climatic change theory, and the overkill theory. The climatic change theory promotes the idea that the global warming, which brought about the end of the Ice Age, caused the animals to die off. The overkill theory states that humans over hunted the animals, and are thus responsible for the extinctions. It is likely that many of these animals became extinct at the end of the Ice Age due to a combination of climatic change and overkill. The Ice Age, which began about one and a half million years ago, is also called the Pleistocene Epoch. The Ice Age consisted of a series of glacial advances and retreats called glaciations and deglaciations. The last glaciation in North America is called the Wisconsin. The Wisconsin glaciation began 122,000 years ago. The animals, ice, age, north, america, about, years, been, change, one, mega, land, ago, new, end, climatic, time, much, mammoth, humans, genera, extinct, changes, species, fauna, continent, climate, called, theory, population, mammoths, large, extinction, began, size