<span>The columbian exchange was based on interactions between the old world and the "New World," since it involved the exchange of goods, ideas, etc between places like the Americas and Europe. </span>
Maurya Empire and Gupta Empire are the most significant but there has been more than that.
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The direct cause of WWI was the assassination of Archduke Franz Ferdinand at Sarajevo on 28 June 1914. However historians feel that a number of factors contributed to the rivalry between the Great powers that allowed war on such a wide-scale to break out.
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The Dow theory is a financial theory that says the market is in an upward trend if one of its averages (i.e. industrials or transportation) advances above a previous important high and is accompanied or followed by a similar advance in the other average.
Explanation:
