Back 1891 en science French 1891 במדע HE 1891 a tudományban Hungarian Науката во 1891 година Macedonian Vitskap i 1891 NN Vitenskapsåret 1891 NB 1891 na ciência Portuguese 1891 год в науке Russian Vetenskapsåret 1891 Swedish 1891 nî kho-ha̍k ZH-MIN-NAN
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| 1891 in science |
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| Technology |
| Social sciences |
| Paleontology |
| Extraterrestrial environment |
| Terrestrial environment |
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The year 1891 in science and technology involved some significant events, listed below.