books.google.ca - Did prehistoric humans walk to North America from Siberia?Native Americans used acorns as a major food source, but how did they get rid of the tannic acid which is toxic to humans?How does radiocarbon dating work and how accurate is it?How was the myth of the vanished "Mound Builders" laid to rest?A...http://books.google.ca/books/about/Archaeology_of_prehistoric_native_Americ.html?id=_0u2y_SVnmoC&utm_source=gb-gplus-shareArchaeology of prehistoric native America
