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File:Albert Einstein writing on a blackboard in Pasadena (1931).jpg

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    English: Albert Einstein writes a density formula of the Milky Way on January 14, 1931 on the board of the Carnegie Institute of the Mt. Wilson Observatory in Pasadena, California.

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    https://www.voanews.com/student-union/student-74-follows-einsteins-footsteps

    https://www.apimages.com/metadata/Index/DEU-Forschung-Quantenphysik/ce5580ea4cbd4e4d8098482dbc0cf90f/36/0
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    Associated Press   wikidata:Q40469 s:en:Portal:Associated Press
     
    Associated Press
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    AP; AP Wire; the Associated Press; the AP; The Associated Press; ap.org
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    creator QS:P170,Q40469

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    Public domain
    This work is in the public domain because it was published in the United States between 1931 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.

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    current20:38, 10 January 2023Thumbnail for version as of 20:38, 10 January 20232,294 × 3,000 (1.79 MB)Cali.maid408Reverted to version as of 17:29, 28 August 2021 (UTC)
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