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1687 Isaac Newton publishes Philosophiae Naturalis Principia Mathematica , the three volume explanation of Newton’s laws of motion . Read Philosophiae Naturalis Principia Mathematica online . 1865 The world’s first maximum speed law is enacted in England. The speed limit of 2mph in town and 4mph in the country is imposed under the Locomotives and Highways Act. 1879 A near-complete skeleton of a Mastodon is discovered near Newburgh, New York, by a farmer’s son while digging |