Back 1999 en science French 1999 במדע HE 1999 a tudományban Hungarian Науката во 1999 година Macedonian Vitskap i 1999 NN Vitenskapsåret 1999 NB 1999 w nauce Polish 1999 na ciência Portuguese 1999 год в науке Russian Vetenskapsåret 1999 Swedish
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| 1999 in science |
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| Fields |
| Technology |
| Social sciences |
| Paleontology |
| Extraterrestrial environment |
| Terrestrial environment |
| Other/related |
The year 1999 in science and technology involved some significant events.