They started domesticating wheat. This wasn't their main feat however since they also started herding sheep and domesticating goats. These two enabled them to stop moving around like nomads and make a real civilization in the area which resulted in what is now known as history.
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A few things connect Ibn Battuta, Marco Polo, and Zheng He, even though their lives did not overlap. They each served kings and emperors. They each traveled enormous distances to places most people from their homelands had never seen.
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<span>candidates for senator must have been citizens of the US for C. at least nine years</span>
