Jan Hus, a priest and rector of Prague University, had spent years attacking clerical corruption and papal authority, drawing on ideas later echoed by Martin Luther. Lured to the Council of Constance under a promise of safe passage, he was tried as a heretic and burned. His death ignited the Hussite Wars and made him a lasting Czech national symbol.

Two days after the Continental Congress adopted it, the Declaration of Independence appeared in print for ordinary colonists to read. The Pennsylvania Evening Post's July 6 edition carried the full text, allowing the document to circulate beyond the delegates in Philadelphia and begin its journey toward towns, army camps, and eventually across the Atlantic.

Joseph Meister, mauled by a rabid dog near Alsace, was brought to Louis Pasteur, a chemist who had never treated a human patient but had developed a weakened rabies vaccine tested only on dogs. Facing certain death otherwise, Pasteur administered a series of injections over the following days. Meister survived, and the case became one of the most celebrated triumphs in the history of medicine.

At a Paris poolside fashion show, engineer-turned-designer Louis Réard presented a two-piece swimsuit so scandalously minimal that no professional model would wear it; he hired a nude dancer from the Casino de Paris instead. He named the garment after Bikini Atoll, where American nuclear tests had occurred days earlier, betting the name would convey shock value.

Nearly 200,000 spectators packed the Maracanã Stadium expecting Brazil to claim its first World Cup title, needing only a draw against Uruguay. Instead Uruguay scored twice in the second half to win 2-1, a result so shocking it became known in Brazil as the Maracanazo. The defeat left a scar on Brazilian football and national identity that lasted generations.

Amid Cold War détente, American and Soviet space officials finalized plans for astronauts and cosmonauts to dock their spacecraft together in orbit, an unprecedented cooperative gesture between rival space programs. The agreement laid groundwork for the July 1975 Apollo-Soyuz mission, in which an Apollo capsule and a Soyuz craft linked up, and crews shook hands through the connecting hatch.

Poland's communist authorities had reluctantly allowed the Polish-born pope to visit his homeland, calculating the risk of refusal was worse than the risk of allowing it. Enormous crowds, uncontrollable by state security, greeted him at every stop. The visit is widely credited with catalyzing the moral confidence that fed into the Solidarity movement the following year.