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Dendrochronologists study tree rings to learn about past climates. Trees in temperate areas form one growth ring per year. Scientists can look at the rings and identify climate conditions during each year of the tree’s life. Scientists found long droughts in both the twelfth and thirteenth centuries. This is the same period when the Anasazi were leaving Chaco Canyon. Under normal conditions it was hard to support their villages in the harsh environment of northern New Mexico. When years of drought occurred, the densely populated Anasazi pueblos could no longer raise enough food. Other forces could have pushed the Anasazi away from Chaco as well.
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His steel empire produced the raw materials that built the physical infrastructure of the United States. He was a catalyst in America's participation in the Industrial Revolution, as he produced the steel to make machinery and transportation possible throughout the nation.
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The tensions that caused the War of 1812 arose from the French revolutionary (1792–99) and Napoleonic Wars (1799–1815). During this nearly constant conflict between France and Britain, American interests were injured by each of the two countries’ endeavors to block the United States from trading with the other.
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He invented the Bolometer. An instrument capable of detecting minute differences in temperature
I BET THEY WERE PLEASED AS PUNCH ALTHOUGH KNOWING ME IM PROBABLE WRONG
