Lord Martin Rees OM, FRS, FREng, FMedSci, Trinity College and Institute of Astronomy, University of Cambridge, Astronomer Royal, will give a lecture entitled The world in 2050 – and beyond?, at 7.30 p.m. on Monday, 5 June 2017, in the Wolfson Lecture Theatre, Churchill College, Storeys Way. Further details are available at http://www.csar.org.uk.