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Mary Stefanc 1905 - 1982

Mary Stefanc of Waukegan, Lake County, Illinois was born on March 11, 1905, and died at age 76 years old in January 1982.

Mary Stefanc
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Waukegan, Lake County, Illinois 60085
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March 11, 1905
Birth
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January 1982
Death
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Updated: November 2, 2011
Biography ID: 48354439 What's this
Mary Stefanc Mary Stefanc (1905 - 1982)
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Mary Stefanc's History: 1905 - 1982

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  • 03/11
    1905

    Birthday

    March 11, 1905
    Birthdate
    Unknown
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  • 01/dd
    1982

    Death

    January 1982
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  • Did you know?
    Mary Stefanc lived 9 years longer than the average family member when died at the age of 76.
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In 1905, in the year that Mary Stefanc was born, 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.
Did you know?
In 1911, she was just 6 years old when British physicist Ernest Rutherford (born in New Zealand), along with German physicist Hans Geiger, discovered the structure of an atom. He found that atoms had nuclei (a nucleus) and were circled by electrons, much as planets orbit the sun.
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Mary Stefanc's Family Tree & Friends

Mary Stefanc's Family Tree

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Mary Stefanc Mar 11, 1905 - Jan 1982
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Other Biographies

Other Stefanc Family Biographies

Stefanc, Joseph (May 8, 1921 - Mar 1981) Stefanc, Joseph (Feb 10, 1888 - May 1983) Stefanc, Joseph (Dec 13, 1944 - Aug 11, 1999)
Stefanc, Sylvia (Dec 20, 1919 - Sep 1969) Stefanc, Frances (Aug 21, 1908 - Mar 1978)
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