Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
In a list of the world's 10 most-cited scientists (Science,4 October, p. 28), the name of biologist Robert Tjian was spelledwrong, and his institution was misidentified. Tjian is a HowardHughes Medical Institute investigator at the University of Californiaat Berkeley. We regret the errors.