This episode was recorded live at the Indiana History Center, where one of their current exhibits is about Gene Stratton-Porter, a best-selling writer, illustrator, nature photographer, naturalist, and film producer.
Research:

Behind the Scenes Minis: Whoopsy Whimsy
24:41

Great Lisbon Earthquake of 1755
39:02

Benzedrine, Pervitin, and WWII
39:42