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Early 20th-Century Developments in Human Flight
Kitty Hawk to World War II The Wright brothers near Kitty Hawk, NC. Although there is some debate about who was the first to fly an airplane, credit for this feat is usually given to Wilbur (…Over and on the Sea
Over and on the Sea One of the next major advancements in human flight came in response to a contest sponsored by The Daily Mail of London, which offered a prize to the first aviator to fly…Aerobatics
Aerobatics The American public may have known airplanes best for their acrobatic flying, or aerobatics, in the years immediately following the Wright brothers' flights because of large cash…Early Military Developments
Early Military Developments Before 1914 militaries used airplanes mostly for surveying of enemy territory. (In 1913, the U.S. Army had only six active pilots and the fledgling U.S.…Commercial Aviation
Commercial Aviation Commercial air passenger service began in the United States (and in the world) in 1914, with a regularly scheduled flight that carried passengers between St. Petersburg…Technological Advancements
Technological Advancements Certain advancements during the 1920s in the design and technology of aircraft gave the United States a new role in the international sphere of aviation.…The Periodic Table
See the interactive periodic table. Although some elements, such as gold and iron, have been known to humans since prehistoric times, it wasn't until the 17th century that the first scientific…Atomic Theory
A theory of the structure and behavior of atoms has taken more than two millenia to evolve, from the abstract musings of ancient Greek philosophers to the high-tech experiments of modern…Phenomena, 2006
Configurations of Sun, Moon, and PlanetsJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember NOTE: The hour listings are in Universal Time. For conversion to U.S. time…Eclipses of the Sun and Moon, 2006
Note: The day of an eclipse is given in Universal Time (UT) and may start a day earlier or later depending on your time zone. (See Phenomena, 2006, to find time of eclipse.)March 15.…Trending
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