Tuesday, August 18, 2026, 2:00 pm EDT
Thursday, August 20, 2026, 6:00 pm EDT
Science History Institute
Friday, August 21, 2026, 12:00 pm EDT
Wednesday, August 26, 2026, 12:00 pm EDT
Tuesday, September 1, 2026, 9:00 am EDT
Tuesday, September 1, 2026, 10:00 am EDT
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Friday, September 4, 2026, 11:00 am EDT
Wednesday, September 9, 2026, 12:00 pm EDT
Thursday, September 10, 2026, 10:00 am EDT
Thursday, August 13, 2026, 10:00 am EDT
Monday, August 10, 2026, 6:00 pm EDT
American Philosophical Society
Thursday, August 6, 2026, 9:00 am EDT
Science History Institute
Tuesday, August 4, 2026, 8:00 am EDT
Wednesday, July 22, 2026, 12:00 pm EDT
Wednesday, July 22, 2026, 10:00 am EDT
Tuesday, July 21, 2026, 2:00 pm EDT
Tuesday, July 21, 2026, 3:00 am EDT
Max Planck Institute for the History of Science
Friday, July 17, 2026, 12:00 pm EDT
Monday, July 13, 2026, 6:00 pm EDT
Science History Institute, College of Physicians of Philadelphia
Thursday, August 20, 2026, 6:00 pm EDT
Science History Institute
“Aspidoceras, Creniceras, Perisphinctes” Lantern slide used to illustrated a lecture on Historical Geography delivered by William Berryman Scott in 1894 at the Wagner Free Institute of Science. Image courtesy of the Wagner Free Institute of Science.
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