How many years are there between 1974 to 2011?

How did the nomadic aspects of mongol society contribute to its rapid expansion? How did Europeans voyages of exploration lead to European empires in the Eastern Hemisphere? What occupations were available during the middle ages? What traits did west African societies share? Who was the first person who invented windmill? What is the most valuable commodity in the west? What is mastrabatetion? What were the main historical causes of the rift between the eastern and western? Middle class homes were not only places to live but also places where the middle class could? Which church dominated the Chesapeake region by 1700? What are some pros and cons of the roman republic? Did ancient Rome create the tower of Giza? What year was it 60 years ago today? Who killed Tanmay Chaturvedi? Who controlled the holy roman empire in the late renaissance? What date when gregorian calendar was started? What is the past tense of the verb begin? How and why did the people lose interest in the crusades? What is the origen of the last name estupinian? Why were European's willing to pay for expensive voyages to find the Northwest Passage?