Alfred Wegener hypothesis of continental drift was replaced in 1967 by plate tectonics. Today, the theory of plate tectonics is widely, this theory explains the structure of the earth's crust and many associated phenomena as resulting from interaction of rigid lithospheric plates that move slowly over the underlying mantle.
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B. Atomic Weapons
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Tanks were used near the end of WW1, with tanks such as the Renault FT, Mark 5, and the German A7Vs. Atomic weapons weren't even a concept back then. Gas was used since 1915, invented by a German scientist trying to develop a pesticide, and Machine guns such as the Vickers or MG08 were common in the trenches.
I believe it was Benjamin Franklin
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Napoleon’s tax system decreased the inequality between the rich and the poor.
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By 1929, there were many weaknesses in the American economy. The economic boom was faltering. It was too heavily based on cars and consumer goods.
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