His birthday was Monday, and now it's Wednesday, but better late than never.
If you're looking for something to celebrate, Nobel Prize-winner Richard Feynman’s birthday was May 11th. In 1959, Feynman gave a lecture titled There's Plenty of Room at the Bottom  about the manipulation of matter at the atomic scale. In that talk, Feynman considered whether "ultimately—in the great future—we can arrange the atoms the way we want; the very atoms, all the way down! What would happen if we could arrange the atoms one by one the way we want them?" Not something many people were thinking about then, but a pretty big deal to us now. Check out Tim Miller’s Nano 101 staff training powerpoint for a bit more information about Feynman , read the full text of the talk , or look up Feynman’s bio on the Nobel Prize website.