Daniel Kennefick talks about resistance to relativity theory in the early twentieth century and the huge challenges that faced British astronomers who wanted to test the theory during the solar eclipse of 1919. Kennefick is an associate professor of physics at the University of Arkansas, Fayetteville. He’s the author of No Shadow of Doubt: The 1919 Eclipse that Confirmed Einstein’s Theory of Relativity (Princeton University Press, 2019).

Michael F. Robinson is professor of history at Hillyer College, University of Hartford. He's the author of The Coldest Crucible: Arctic Exploration and American Culture (University of Chicago Press, 2006) and The Lost White Tribe: Scientists, Explorers, and the Theory that Changed a Continent (Oxford University Press, 2016). He's also the host of the podcast Time to Eat the Dogs, a weekly podcast about science, history, and exploration.

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