Paul S. Wesson, B.Sc., Ph.D., D.Sc., F.R.A.S (September 11, 1949 – September 16, 2015) was a professor of astrophysics and theoretical physics. He was educated at the Universities of London and Cambridge in England, and spent most of his career at the University of Waterloo in Canada. He also spent sabbatical leaves at Berkeley and Stanford in California, and was associated in his later years with the Herzberg Institute of Astrophysics in Victoria, Canada. He supervised numerous graduate students and postdoctoral fellows and served as Science Director of the California Institute for Physics and Astronomy. His scientific interests were broad, ranging from a seismic survey of Afghanistan to guest lectures and media interviews on the Big Bang in America. He published over 300 works including