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What were some real challenges that 15th century European explorers faced? What was the name of the warlike Asian tribe which displaced Germanic tribes around 300 CE putting pressure on the Roman empire? Which was one of the first historians to emphasize documented facts over unverifiable stories? How many days have passed since January 1980? What was the thing ancient Romans used to carrywater? Who was a Mauryan ruler who built new roads and hospitals for people and animals? How did the Renaissance spark the growth and exchange of ideas and knowledge across Europe? How do you think the history of Roman would have been different if Spartacus had succeeded in crossing the alps? Which roman republic was made by jullius Caesar? How long have human beings lived in the western hemisphere? What is Patrician definition? Feudalism would have continued if the crusaders did not happen why or why not? Who invented phat pants? What did Walter hunt invent in 1849? How has this landmark changed over time? Why would alchemists keep their secrets from the rest of the world? Which policy developed by diplomat George F Kennan was dedicated to preventing the further spread of communism throughout the Cold War? The tetrarchy system created by Diocletian was intended to? Were the crusades a waste of time? Why did the Mongol Empire fall apart?