User blog comment:99998888833344/New Da Vinci Painting Revealed -- The Real Truth?/@comment-4043223-20110729084627

Now that is an awesome painting by Da Vinci, particularly because the effect that the globe gives off (or the illusion of transparency) was not a technique thought to have been used until the 17th century. Just goes to prove (even further) what a genius Da Vinci was. Very cool indeed.