The notebooks in which Sir Isaac Newton worked out the theories on which much classical science is based have been put online by Cambridge University. More than 4,000 pages have been scanned, including his annotated copy of Principia Mathematica, containing Newton's laws of motion and gravity.

Newton wrote mainly in Latin and Greek, the scientific language of his time, and was reluctant to publish. The university plans to put almost all of its Newton collection online.

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