Ernst K. Zinner, Ph.D., research professor of physics and of earth and planetary sciences, both in Arts & Sciences, at Washington University in St. Louis, will participate in the AAAS “Exploring a Dusty Cosmos” press briefing at 8 a.m. Central Time Monday, Feb. 20, in Room 274, second floor, America’s Center. Zinner is presenting in the 9 a.m. symposium “Stardust: Solar System Birth and Death.” The title of his talk is “Stardust in the Laboratory.”