We're joined by Katie Sekelsky of The Inkling, who brings us the tragic tale of the Johnstown Flood in 1889. [Thanks a lot, Robber Barons! ] Learn about a few more historic floods--and why it's important to have, say, actual trained professionals build your reservoirs. Later, enjoy a quiz called "That Damn Dam!"

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[Music: 1) Bertha Chapin, "Johnstown Flood," 1955; 2) Frau Holle, “Ascending Souls,” 2017. Courtesy of Frau Holle, CC BY-NC 3.0 license.]