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  • Copernicus' celestial spheres

    Book Created date: 1515-32

    Since the time of Aristotle in the 5th century BCE, western learning advocated that heavenly bodies revolved around the...

  • Newton's Principia Mathematica

    Book

    Sir Isaac Newton (1642–1727) not only proposed the law of gravity and the three laws of motion, but he is also credited ...

  • Petrarch, Opuscula varia

    Manuscript Created date: 1398

    Petrarch (d. 1374) is widely considered the father of Renaissance humanism, a cultural movement characterized by a renew...