St Cross College: 2nd Lorna Casselton Memorial Lecture 2016; Professor Ada Yonath, Nobel Laureate, will speak on Global challenges in modern medicine and in revealing the origin of life, at 5 p.m. on Wednesday, 4 May 2016, in Lecture Theatre 1, Mathematical Institute, Woodstock Road; admission is free but by ticket only; to book, please visit http://www.stx.ox.ac.uk/lorna-casselton-memorial-lecture-booking-form