Modern skyscrapers are built with steel or reinforced concrete frameworks and curtain walls of glass or polished stone. Until the 19th century, buildings of over six storeys were rare, as having great numbers of stairs to climb was impractical for inhabitants, and water pressure was usually insufficient to supply running water above 50m.
After an early competition between Chicago and New York City for the world's tallest building, New York took the lead by 1895 with the completion of the American Surety Building, leaving New York with the title of tallest building for many years. New York City developers competed among themselves, with successively taller buildings claiming the title of "world's tallest" in the 1920s and early 1930s, culminating with the completion of the Chrysler Building in 1930 and the Empire State Building in 1931, the world's tallest building for forty years. The first completed World Trade Center tower became the world's tallest building in 1972. However, it was soon overtaken by the Sears Tower (now Willis Tower) in Chicago within two years.
Some skyscrapers of note include the Willis Tower and Trump International Hotel in Chicago, the Empire State Building and Chrysler Building in New York, The U.S. Bank Tower in L.A., the Comcast Center in Philadelphia, the Columbia Center in Seattle, the Bank of America Plaza in Dallas, the Four Seasons Hotel and Tower in Miami, and the Republic Plaza in Denver.
If you’re not sure what live wallpapers are, they're a type of application that works on a mobile device using the Android operating system (like your device!). The application works as a wallpaper – providing the background image for the home screen—but also works as a conventional application since it can provide user-interaction with the touch screen (allowing the image to change dynamically, for example) and access other hardware and software features within the device (accelerometer, GPS, network access, etc.).
**Multiple backgrounds!** Switch up the background as often or as little as you like with user-configurable options.
**Power saving features!** This app uses much less power than typical live wallpapers. It will take a bit more power to operate than a normal wallpaper, but much, much less battery power than the average live wallpaper.
**Super easy to use!** Upon install the app will bring up the options menu and then immediately let you set the wallpaper. No hassle and easy to use!
**Translated to 35 languages!** Do you really, really want to learn Russian? We didn’t think so, but it’s available just in case, in any language your phone can display!
Please note that live wallpapers can’t be set automatically. We’ll bring you to the setup screen where you’ll select the live wallpaper. We’d love to do it automatically but Android doesn’t allow it. Maybe some day.
No skyscrapers were harmed in the making of this app. Select text from Wikipedia, which does not endorse this product. Licensed under the creative commons (creativecommons.org/licenses/by/3.0/). Text at wikipedia.org/wiki/Live_Wallpaper and wikipedia.org/wiki/Skyscraper.
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