Encyclopedia > 22nd century BC

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22nd century BC

(23rd century BC - 22nd century BC - 21st century BC - other centuries)

(4th millennium BC - 3rd millennium BC - 2nd millennium BC)


Significant persons:

Inventions, Discoveries, Introductions:

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List of inventions

... Microscope: Zacharias Janssen[?] 17th century 1608: Refracting telescope: Hans Lippershey 1609: Telescope: Galileo Galilei 1611: Telescope: Johannes Kepler ...