| | William James Sidis Encyclopedia @ AlienArtifacts.com (Alien Artifacts) (Site not responding. Last check: ) |
 | | William James Sidis (April 1, 1898–July 17, 1944) was a highly gifted mathematician and a child prodigy in the United States of America in the early 20th century. |
 | | Sidis was born to Russian Jewish immigrant parents, Boris Sidis and Sarah Sidis née Mandelbaum, on April 1, 1898 in New York City. |
 | | In 1919, Sidis was arrested for participating in an anti-draft May Day parade (though initially a socialist, Sidis later favored libertarianism) and sentenced to 18 months in jail under the Sedition Act of 1918 for acting as a conscientious objector. |
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