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One result of advances in medical technology is a longer life expectancy for patients. Medical research in recent times has discovered many new methods and medicines that help humans to expand their lives. ... Furthermore, the use of technology helps to prevent conditions instead of fixing them after they are presented
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Traders moved their goods across the Sahara in large groups called caravans. Camels were the main mode of transportation and were used to carry goods and people. Sometimes slaves carried goods as well. Large caravans were important because they offered protection from bandits.
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The buildup of savings did this because it meant that after the war, people would have lots of money saved up that they could use to buy consumer goods. Once the war ended, the factories would have to turn from producing war materiel to producing consumer goods again. If people had little money, there would have been little demand for these goods. But during WWII, people saved a great deal of money. Once the war ended, they could use that money to buy things like cars that had not been available during the war. This flurry of buying prevented a depression.
