What challenges did traveling in the Incense Trade Route in the desert pose to traders? How did they overcome those challenges?

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deists, human beings can know god only via reason and the observation of nature, but not by revelation or by supernatural manifestations (such as miracles

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

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