September's I Spy
The Short, Rich Life of Positronium
"'The light-producing dance of annihilation,'" mused Mark Kennedy, physics department employee, on September's clue. "Easy! It is a sculpture by a friend of mine, Jens Zorn," U-M emeritus professor of physics. The sculpture is "known as 'The Short, Rich Life of Positronium,'"wrote Jim Pluta. "I am delighted that we get to enjoy a bit of physics in 'I Spy!'"