See the mass ascension of balloons at Albuquerque International Balloon Fiesta, 2010
Balloons at the Albuquerque International Balloon Fiesta, New Mexico, 2010.
Michael Salisbury/Skylight.cc (A Britannica Publishing Partner)
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail Gary Todd; © Georgios Kollidas/Dreamstime.comOverview of the invention of the telephone, with a focus on the work by Alexander Graham Bell.
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© 2025 Thomson ReutersRobots competed in tennis, track-and-field, boxing, martial arts, and other sports at the World Humanoid Robot Games in Beijing.
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Encyclopædia Britannica, Inc.Audrey Tang's goal is to make all information, data, and resources as publicly accessible as possible.
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Encyclopædia Britannica, Inc.The bald eagle is a conservation success story—and a national symbol.
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© Fun Travel TV (A Britannica Publishing Partner)Learn about hot-air ballooning in the Southern Alps of New Zealand's South Island.
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World War I is remembered for its terrible combination of technological ingenuity and strategic indecisiveness. The growth of army sizes, and the introduction of new weapons like long-range heavy artillery and chemical gas, turned combat into mechanized carnage on an unprecedented scale. It also made it more essential than ever for armies to gather information about enemy troops and weapons. Stationary balloons were used for observation and artillery spotting as early as the American Civil War but found widespread use in World War I. This video shows the view from a balloon over the Western Front.
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Weerayos Surareangchai/Dreamstime.comOverview of the global financial crisis of 2007–08.
