On July 16, 1945 the atomic age began with the Trinity nuclear test.
Why ancient Roman concrete is better than modern mixes.
Old New York: film from the Library of Congress of New York City circa 1900.
A Short History of the Condom.
ICYMI, Friday’s links are here, and include Bastille Day, the 47 names Disney considered for the 7 dwarfs, cases of Madeira from 1796 (stocked to celebrate John Adams’ presidential election) found in a museum basement, and the stories behind iconic movie props.