When Heidi Fearn, a theoretical physicist at California State University, Fullerton, returned from sabbatical in 2012, she found a surprise in the laboratory adjoining her office: a man, an old man named James F. Woodward. Fearn knew him from around—he was a professor of science history and an adjunct professor of physics. With white hair and eyes perpetually peering over the top of his glasses, he fit the part. Still, she thought, “What the heck is this guy doing in my back room?”