In 1629, the natural philosopher Ren Descartes enticed a young artisan to undertake a secretive project, one that promised to revolutionize early modern astronomy. Descartes believed he had conceived a new kind of telescope lens, shaped by the light of reason itself, & surpassing anything ever to come from the hands of the glass-working craftsmen of the era. These novel lenses would never be touched by human hands -- they would be cut by an elaborate...
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