Back 1899 en science French 1899 במדע HE Znanost u 1899. Croatian 1899 a tudományban Hungarian Науката во 1899 година Macedonian Vitskap i 1899 NN Vitenskapsåret 1899 NB 1899 w nauce Polish 1899 na ciência Portuguese 1899 год в науке Russian
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| 1899 in science |
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| Extraterrestrial environment |
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The year 1899 in science involved some significant events, listed below.