Back 1644 en science French 1644 a tudományban Hungarian Науката во 1644 година Macedonian Vitenskapsåret 1644 NB 1644 год в науке Russian 1644 nî kho-ha̍k ZH-MIN-NAN
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| 1644 in science |
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| Technology |
| Social sciences |
| Paleontology |
| Extraterrestrial environment |
| Terrestrial environment |
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The year 1644 AD in science and technology involved several significant events in mathematics, technology, and medicine.