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Radiocarbon dating on bone

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For generations of archaeologists the understanding of how the Americas first came to be inhabited was that ancient Siberians crossed on foot from Asia to Alaska over a land bridge that spanned the Bering Sea.

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Subfossils are useful for studying the evolutionary history of an environment and can be important to studies in paleoclimatology.A subfossil (as opposed to a fossil) is a bone or other part of an organism that has not fully fossilized.This may be because not enough time has elapsed since the animal died, or because the conditions in which the remains were deposited were not optimal for fossilization.After the Pleistocene animals became extinct, these ancient Americans diversified to fishing, gathering, and hunting smaller game and marine mammals.From these different adaptations arose the many diverse cultures of pre-Columbian America, eventually developing into great civilizations.In succeeding years many further specimens have been found, not only in the German Neander Valley, but in with rickets, caused by a deficiency of vitamin D.