Editing Free fall (section)

=== Galileo Galilei ===
{{See also|Galileo Galilei#Falling bodies}}{{See also|Galileo's Leaning Tower of Pisa experiment}}
According to a tale that may be apocryphal, in 1589–1592 Galileo [[Galileo's Leaning Tower of Pisa experiment|dropped two objects of unequal mass from the Leaning Tower of Pisa]]. Given the speed at which such a fall would occur, it is doubtful that Galileo could have extracted much information from this experiment. Most of his observations of falling bodies were really of bodies rolling down ramps. This slowed things down enough to the point where he was able to measure the time intervals with [[water clock]]s and his own pulse (stopwatches having not yet been invented). He repeated this "a full hundred times" until he had achieved "an accuracy such that the deviation between two observations never exceeded one-tenth of a pulse beat." In 1589–1592, Galileo wrote ''[[De Motu Antiquiora]]'', an unpublished manuscript on the motion of falling bodies.{{Citation needed|date=October 2019}}