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Astronomer observing the sky with a telescope - from: Johannes Hevelius (1611-1687), Selenographia, sive Lunae descriptio (Selenography, or A Description of The Moon)
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Leonardo da Vinci's Fragmenting Bomb mortar or canon. Re-construction from a drawing in the Codex Atlanticus, Folio 33 r. Italian polymath Leonardo da Vinci (1452-1519) - SuperStock
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