Mr. Dodecahedron is joined by planetarium experts Brent Abbatantuano, Michael McConville, and Owen Phairis to discuss the amazing life of Armand Spitz and his revolutionary planetarium projector.

Mr. Dodecahedron is joined by archeologists Dr. Miranda Aldhouse-Green, Dr. Frances McIntosh, Judy Stevenson, and Rudiger Schwarz to discuss the Roman Dodecahedron, a mysterious bronze artifact from the Roman Empire. No one knows exactly who made them, or why... In this episode we discuss their archeological origins, theories of use, Celts, Gallo-Romans, and sacred light projectors.