In 1818, something about the rings of Saturn - we don't know what, exactly - led John Cleves Symmes  to conclude that the Earth was hollow. And he spent the rest of his life promoting this strange idea.    Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Symmes’s Theory of Concentric Spheres

Join Holly and Tracy as they bring you the greatest and strangest Stuff You Missed In History Class in this podcast by iHeartRadio.

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George Gustav Heye’s work in curating a collection of Native American artifacts has enabled many people to learn about indigenous cultures. But his colleting practices and relationship to those cultures are complicated.

George Gustav Heye

This 2012 episode from prior hosts Sarah and Deblina covers dentist Horace Wells. At an exhibition in 1844 he became certain that nitrous oxide could revolutionize medicine. He tried to demonstrate his findings, but things didn't go as planned. See omnystudio.com/listener for privacy information.

SYMHC Classics: Horace Wells and the Gas War

Tracy and Holly discuss Sir Humphry Davy's less than spectacular poems, Mary Shelley's "Frankenstein," and the end of Davy's career and life.  See omnystudio.com/listener for privacy information.

Behind the Scenes Minis: Bad Poetry

Davy's career after his work in nitrous oxide included the invention of a miner's lamp designed to make mining safer. This invention came with a bit of controversy.

Sir Humphry Davy and the Miner’s Lamp (Part 2)

Chemist Sir Humphry Davy is known for his work with nitrous oxide, or laughing gas. That early part of his career is the focus of part one of this two-parter.

Symmes’s Theory of Concentric Spheres

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