Home Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
Francis Rogallo
Directory
References
Discover
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Still from the film Deliverance, 1919. The story of Helen Keller and Anne Sullivan. View shows Keller in the cockpit/front seat of an airplane.
How Did Helen Keller Fly a Plane?
Bog body. Head of Tollund Man. Died at about age 30-40, Dated to about 280 BCE early Iron Age. Found Bjaeldskovdal bog Denmark in 1950 near Elling Woman. Most well preserved bog body to date. Human remains mummified in natural peat bogs. mummy, embalm
9 Noteworthy Bog Bodies (And What They Tell Us)
Statue of Liberty in front of the skyline of Manhattan, New York City, New York.
Who Was the Woman Behind the Statue of Liberty?
Shadow of a man holding large knife in his hand inside of some dark, spooky buiding
7 of History's Most Notorious Serial Killers 
earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.
The 6 Deadliest Earthquakes Since 1950
Eye. Eyelash. Eyeball. Vision.
7 Vestigial Features of the Human Body

Francis Rogallo

American aeronautical engineer

Learn about this topic in these articles:

hang gliding

  • hang gliding
    In hang gliding

    …from kite designs developed by Francis Rogallo and his wife, Gertrude. The Rogallos’ kites had attracted attention because of NASA’s interest in using them for spacecraft retrieval. On the dunes cheap materials such as bamboo and plastic sheeting were used, and the parallel-bar control method remained. Around the same time,…

    Read More