Beautiful free vector illustration of a cat face on a dark black background. Huge realistic eyes with reflections in them. This picture looks amazing when used as a wallpaper.
I vectorized this with Inkscape from a public domain line drawing I found on Wikipedia by a user named "Rama". I also have posted this SVG file to the Wikimedia Commons:
http://commons.wikimedia.org/wiki/Image:Caduceus.svg
Original drawing:
http://commons.wikimedia.org/wiki/Image:Caduceus_large.jpg