Protests Erupt In Syria Over Christmas...
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No best answer has yet been selected by 10ClarionSt. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.apparently nobody used wheels - but funnily enough archaeologists have uncovered wheeled toys in Mexico, which suggests they knew the principle but did not get around to doing anything with it. Some discussion of it here
Horses originally evolved in North America but died out and were re-introduced by the Spaniards. The Incas used llamas, which are not great as beasts of burden. See here
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