Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. QED is a play by American playwright Peter Parnell, which chronicles (part of) a day in the life of Nobel Prize-winning physicist Richard Feynman. It presents scenes from a day in Feynman''s life, less than two years before his death, interweaving many strands from Feynman''s biography, from the Manhattan project to the Challenger inquiry to more personal topics such as the death of Feynman''s wife, and his own fight with cancer. The play, which grew out of a collaboration between Parnell, actor Alan Alda and director Gordon Davidson, premiered in 2001. The original production was performed first at the Mark Taper Forum in Los Angeles and, from late 2001 to mid-2002, on Broadway, directed by Davidson and starring Alda as Feynman.