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Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed. As well as dating them this can give data for dendroclimatology, the study of climate and atmospheric conditions during different periods in history from wood.
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Totalitarianism! This is essentially a dictatorship in which the power of the government (typically a single person and a few trusted advisors) have absolute power over the people.
Answer: The amount of resources and space for industry, and advancements, as well as the technology from Europe that the U.S. had access to, made the U.S. the dominant power in the Western Hemisphere.
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