The Department of Biology’s seminar speaker on Friday, Dec. 5, at 3:30 p.m. is Lauren Walker, an Assistant Professor in the Department of Molecular and Systems Biology (Geisel School of Medicine) at Dartmouth College. Her seminar will be held in Kollros Auditorium (Room 101), Biology Building East (BBE). A reception with refreshments will be held in the BBE Lobby following the seminar. Anne Martin is the faculty host.