Chemist Carl Djerassi has written many scientific books and papers. He’s also published poetry, fiction and a play, “Oxygen,” which he co-wrote with Roald Hoffman. The play was performed by students at the University of Wisconsin, with a little help from the playwright. Carl Djerassi talks with Steve Paulson about the play and why it’s so important to scientists to get there first, and we hear excerpts from the play.