April 2026 Professor Tamlin Pavelsky April 2, 2026 March 2026 Assistant Professor Harriet Lau March 19, 2026 Associate Professor Sarah Stamps, March 5, 2026 February 2026 Professor John Higgins, February 26, 2026 Assistant Professor Mickey MacKie, February 19, 2026 Professor Sherilyn Fritz, February 5, 2026 January 2026 Professor Emerita Anne Hofmeister, January 29, 2026 Dr. Jacob Jordan, CSO at Mati Carbon, January 22, 2026 August 2022 Professor Emeritus Raymond E. Arvidson, the James S. McDonnell Distinguished University Professor Emeritus - My 50 Years Exploring Mars: From the Viking Landers to the Perseverance Rover