Leonardo DaVinci's many talents included his grasp of a wide array of scientific branches including Anatomy, Zoology, Botany, Geology, Optics, Aerodynamics, and Hydrodynamics.  He was a firm believer in the importance of precise scientific observation, upon which most of his theories were based.  Unfortunately, he treated  his science projects the way he treated most of his artworks, thus most of his planned works were abandoned upon early conception.  Leonardo's theories were contained in numerous notebooks written in his infamous backward writing.  Had his notebooks been found in his time, scientific progression would have advanced far quicker than it already has.
     
    Some of Leonardo's theories are remarkably true to modern science.  In anatomy, he studied the circulation of the blood and the action of the eye.  He made discoveries in meteorology and geology, learned the effect of the moon on the tides, foreshadowed modern conceptions of continent formation, and surmised the nature of fossil shells.  He was among the originators of the science of hydraulics and probably devised the hydrometer; his scheme for the canalization of rivers still has practical value.  He invented a large number of ingenious machines, many potentially useful, like the underwater diving suit.  His flying devices, although not practicable, embodied sound principles of aerodynamics.

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    Some excerpts taken from the Microsoft Encarta 96 Encyclopedia Weblaunch 2001 Myomi Chu

     
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