Professor Jonathan Slack has worked in London and Oxford and is currently Head of the Department of Biology and Biochemistry at the University of Bath in England. He is a member of the European Molecular Biology Organization and a Fellow of the Academy of Medical Sciences. He is a leading authority in developmental biology and has published over 150 scientific papers, as well as the well-received monograph From Egg to Embryo and the lighthearted and popular Egg and Ego.