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Helen Callahan 1898 - 1976

Helen Callahan of Saint Louis, Saint Louis City County, Missouri was born on March 22, 1898, and died at age 77 years old in January 1976.
Helen Callahan
Saint Louis, Saint Louis City County, Missouri 63116
March 22, 1898
January 1976
Female
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Helen Callahan's History: 1898 - 1976

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  • 03/22
    1898

    Birthday

    March 22, 1898
    Birthdate
    Unknown
    Birthplace
  • 01/dd
    1976

    Death

    January 1976
    Death date
    Unknown
    Cause of death
    Unknown
    Death location
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  • Did you know?
    Helen Callahan lived 4 years longer than the average family member when died at the age of 77.
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Did you know?
In 1898, in the year that Helen Callahan was born, on March 24th, Robert Allison of Pennsylvania became the first person to buy an American-built car. He bought a Winton, which he had seen in an advertisement in Scientific American. The Winton, built in Ohio, was made by hand and came with a leather roof, padded seats, gas lamps, and tires made by B.F. Goodrich.
Did you know?
In 1905, by the time she was only 7 years old, the German born physicist, Albert Einstein, proposed the Special Theory of Relativity: 1) that observers can never detect uniform motion except relative to other objects and that 2) unlike the velocity of massive objects, the speed of light is a constant and is the same for all observers independent of their constant velocity toward or away from the light source. Not such simple concepts that lead to the equation everyone now knows: E = mc2.
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Helen Callahan's Family Tree & Friends

Helen Callahan's Family Tree

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Friendships

Helen's Friends

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Other Biographies

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