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When did Zacharias Janssen invent the compound microscope?

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  1. ummmmmmmmm........ok......? i dont think he can do all that in DIFFERENT years........


  2. 1590 - 1595

  3. 1595

  4. It was invented in 2090 of March!!! You're all liars!!!

  5. in 1590

  6. 1595 with his father Hans Janssen.
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