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AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
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apr 20, 1912 - 1912 He worked withh his friend Marcel Grossmann together began a new phase of investigation called bravitational

Added to timeline:

5 Sep 2017
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BIOGRAFIA DE ALBERT EISTEIN

Date:

apr 20, 1912
Now
~ 106 years ago
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