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==Physics== * The final book of the now-blind [[Galileo Galilei|Galileo]], ''[[Two New Sciences|Discorsi e dimostrazioni matematiche, intorno à due nuove scienze]]'' is published in [[Leiden]], dealing with the [[materials science|strength of materials]] and the [[kinematics|motion of objects]]. In it, he discusses the [[square–cube law]], the [[law of falling bodies]] and [[infinity]]. He also discusses his experimental method for measuring the [[speed of light]]; he has been unable to determine it over a short distance.<ref>{{cite book|author=Galileo Galilei|title=Two New Sciences|location=Madison|publisher=University of Wisconsin Press|year=1974|isbn=0-299-06404-2|url-access=registration|url=https://archive.org/details/twonewsciencesin0000gali}}</ref>
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