| Year | Session | Title | Moderator(s) |
| 1991 | S | The Meaning of Evolution | Carl Swanson |
| 1991 | F | The Meaning of Evolution | Carl Swnson |
| 1992 | S | Seeds of Change | Carl Swanson |
| 1992 | F | Seeds of Change | Carl Swanson |
| 1998 | S | Human Origins | John Olson |
| 1998 | F | Evolution & its Impact on Modern Thought | Arthur Quinton |
| 1999 | S | Human Origins | John Olson |
| 2000 | F | Human Origins | John Olson |
| 2002 | S | Bugs: Their Life and Lore in Fact and Fiction | Hy Edelstein |
| 2002 | F | Genes, Languages, and Human Migrations | John Olson and Dorothy Rosenthal |
| 2002 | F | DNA Past, Present, and Future | Gillian Morbey and Philip Tompkins |
| 2003 | S | Bioscience Advances: Implications | Gillian Morbey and Philip Tompkins |
| 2003 | S | Fungi and Human Affairs | Dorothy Rosenthal |
| 2004 | S | Birds: Not Just for Bird Watchers | Dorothy Rosenthal |
| 2004 | F | Human Evolution and Language | John Olson |
| 2005 | F | Biology and Social Sciences | Marianne and Helen Lambert |
| 2005 | F | Trees | Ann Lombard and Dorothy Rosenthal |
| 2006 | S | DNA and Human Migration | John Olson |
| 2006 | F | The Secret Life of Lobsters | Jim and Nina Scott |
| 2007 | S | Invertebrate Life and Lore | Hy Edelstein |
| 2007 | S | Plants of Change | Bev von Kries |
| 2009 | S | The Legacy of Darwin | Dorothy Rosenthal and Jim Scott |
| 2009 | F | Evolution of Evolution: Recent Advances | A. Lombard, C. Matthews & D. Rosenthal |
| 2010 | S | All About Orchids | Janet Price and Bev von Kries |
| 2010 | F | Our Gang: The Primates | Dorothy Rosenthal |
| 2011 | F | Human Evolution: Physical & Cultural | Dorothy Rosenthal |
| 2012 | S | Images of the Brain: the Art of Neuroscience | Gordon Wyse |