In March and April, Harvard speakers offer talks on topics ranging from Alexander the Great to the science of aging. Among those scheduled to visit Harvard-Radcliffe clubs are director of the Office of the Arts Myra Mayman, at the Harvard Club of Phoenix on March 4, the Harvard-Radcliffe Club of Southern California on March 12, and the Harvard Club of New Jersey on April 29; dean of the College Harry R. Lewis, at the Harvard Club of St. Louis on March 20; historian and novelist Richard Marius, at the Harvard-Radcliffe Club of the Inland Northwest on March 26; astrophysicist David Layzer, at the Harvard Club of Oklahoma City on March 27, the Harvard-Radcliffe Club of Central New York on April 14, and the Harvard Club of Broward County on April 22; behavioral scientist Douglas Powell, at the Harvard Club of Dayton on April 20; and art historian David Mitten, at the Harvard Club of West Virginia on April 23.