This 2012 episode from previous hosts Sarah and Deblina discusses how during Jack Johnson's time, the heavyweight championship was unofficially a whites-only title. Despite discrimination, Johnson became the first black heavyweight champion, but some questioned his legitimacy.

Robert Moses and the Shaping of New York, Part 2
42:12

Robert Moses and the Shaping of New York, Part 1
41:59

SYMHC Classics: Eradication of Smallpox
43:25