Robert Hooke's engraving of Kettering stone as seen under a microscope, published in his book "Micrographia" in 1665.

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Photo credit: © Science History Images / Alamy / Afripics
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Keywords: 1665, 17th, art, century, colorized, engraving, enhanced, etching, history, hooke, illustration, kettering, magnified, micrographia, microscopic, print, renaissance, robert, science, stone