Two men operate the enormous UNIVAC (UNIVersal Automatic Computer) in 1960. Hulton Archive/Getty Images/Life hide caption

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The website Silk Road allows users to anonymously buy illegal drugs. U.S. lawmakers are seeking a crackdown against the site. iStockphoto hide caption

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Water normally boils at 212 degrees Fahrenheit — and doesn't get hotter. But under pressure, it boils at 242 F. In a pressure cooker, food cooks at a higher temperature, which speeds up the cooking process. Above, a 1948 pressure cooker. Chaloner Woods/Getty Images hide caption

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