(Q69259119)
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Hessballon.jpg
876 × 1,018; 105 KB
876 × 1,018; 105 KB
Austrian physicist Victor Francis Hess on his return from the balloon flight on which he discovered the existence of cosmic rays (English)
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7 August 1912Gregorian
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1912-08-07
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- commonswiki Category:1912-08-07