Yvonne Buckley, professor of zoology at Trinity College Dublin, will present the fall 2019 Science Achievement Graduate Fellows (SAGF) Lecture on Tuesday, October 29, at 3:30 p.m. in Berg Auditorium (100 Huck Life Sciences Building) on the Penn State University Park campus. This free public lecture, titled "The biogeography of plant and animal populations" will be preceded by a public reception at 3:00 p.m. in the auditorium lobby and is sponsored by the Department of Biology and the Penn State Eberly College of Science.