The Howard Hughes Medical Institute's 2003 Holiday Lecture Series on Science features oncologist Bert Vogelstein and neurologist Huda Zoghbi, who will each present two lectures via live webcast on December 4th and 5th (free registration required). Vogelstein and Zoghbi will speak on "how their patients have led them to a deeper understanding of the genetic and molecular bases of cancer and neurological disorders." The Holiday Lecture Series is chiefly intended for students in high school science courses, but registration is open to any interested viewer. The website offers three detailed essays relating to lecture topics, as well as downloadable lecture summaries and biographies of the speakers. A slide format is available for viewers with slower Internet connections. [RS]