Ramblings from another nerd on the grid
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?