I met Roger in 1991, when he and I moved our labs to the new ‘‘HHMI floor’’ at the Center for Molecular Medicine building at UCSD. My first encounter with Roger was quite awkward and memorable: I tried engaging him in conversation, but he was reserved, shy, and very eager to get back to his work. I was outgoing, loud, and totally oblivious to Roger’s body language—visibly screaming, ‘‘Please le...