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Some spores are so light they get picked up by the wind and blown to a new place. Other spores ride on the currents of rivers and streams. Still others get shot out into the air by the fungus which made them, or placed in a fragile container that bursts open when touched
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There are multiple factors.
The Marshal Plan - provided economic aid, debts were repaid, there wasnt anymore spending on wars, etc.
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In Old World archaeology, Mesolithic (Greek: μέσος, mesos "middle"; λίθος, lithos "stone") is the period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymously, especially for outside northern Europe, and for the corresponding period in the Levant and Caucasus. The Mesolithic has different time spans in different parts of Eurasia. It refers to the final period of hunter-gatherer cultures in Europe and Western Asia, between the end of the Last Glacial Maximum and the Neolithic Revolution. In Europe it spans roughly 15,000 to 5,000 BP; in Southwest Asia (the Epipalaeolithic Near East) roughly 20,000 to 8,000 BP. The term is less used of areas further east, and not at all beyond Eurasia and North Africa.
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