This 2010 episode from prior hosts Sarah and Deblina examines how Tycho Brahe lost his nose, built the world's first observatory, and met with an untimely demise. It also has some info in the intro that wasn't known in 2010.
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Catalan inventor Narcís Monturiol fought for ideals like equality, freedom, and progress in the midst of a lot of social and political chaos in 19th-century upheavals in Spain and Catalonia. And then, he built submarines.
This 2013 episode covers the Mendez v. Westminster case that fought the segregation of Mexican-American students in the state of California in the 1940s. It went on pave the way for the much more famous Brown v. Topeka Board of Education.
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