Everyone knows Leonardo Da Vinci wasn't normal.  The man wrote in mirror image (backwards) for heavens sake.  You can find some of his works on a new website at http://ttpdownload.bl.uk/.  I particularly like the study on reflection of the moon and earth.  If you hit the M key while looking at the Leonardo Da Vinci Codex Arundel, it will flip the text to a more "normal" view.  Experiment with the magnifying glass.  Very very kewl indeed.

There are some other rather fascinating works there as well.  For more background on the project, see http://www.turningthepages.com/

One last question... was Leonardo di ser Piero da Vinci the greatest painter of all time?