Professor Zhang Jing, of the Key State Laboratory of Coastal and Estuarine Studies, ECNU, Shanghai, will give a lecture entitled The effects of the Sanxia Dam on the Yangtze, on Thursday, 18 January, in the Buckingham House Lecture Theatre, New Hall, at 5.15 p.m. Admission is free and all are welcome. To book, please e-mail directorate@unep-wcmc.org. For details of future lectures, see the College website at http://www.newhall.cam.ac.uk/events/.