Hollywood power couple Douglas Fairbanks and Mary Pickford, who co-founded the movie studio United Artists with Charlie Chaplin and D.W. Griffith, become the first celebrities to leave their impressions in concrete at Grauman's Chinese Theater in Hollywood, located along the stretch where the historic Hollywood Walk of Fame would later be established.

During the last days of the Third Reich, as Russia's Red Army closes in from the east, Adolf Hitler marries his long-time partner Eva Braun in a Berlin bunker during a brief civil ceremony witnessed by Joseph Goebbels and Martin Bormann. Both Hitler and Braun commit suicide the next day, and their corpses are burned in the Reich Chancellery garden.

After refusing induction into the United States Army the day before due to religious reasons, Muhammad Ali is stripped of his heavyweight boxing title. He is found guilty of a felony in refusing to be drafted for service in Vietnam, but he does not serve prison time, and on June 28, 1971, the U.S. Supreme Court reverses his conviction. His stand against the war had made him a hated figure in mainstream America, but in the black community and the rest of the world he had become an icon.

Norwegian ethnographer and adventurer Thor Heyerdahl and his five man crew set out from Peru on a giant balsa wood raft called the Kon-Tiki in order to prove that Peruvian natives could have settled Polynesia. After a 101 day, 4,300 mile (8,000 km) journey, Kon-Tiki smashes into the reef at Raroia in the Tuamotu Islands on August 7, 1947, thus demonstrating that it is possible for a primitive craft to survive a Pacific crossing.

After two days of rumors and denials the Soviet Union admits there was an accident at the Chernobyl nuclear power plant in Ukraine. Reactor number four had suffered a meltdown, sending a plume of radioactive fallout into the atmosphere and over an extensive geographical area. Today the abandoned radioactive area surrounding Chernobyl is rife with local wildlife and has been converted into a wildlife sanctuary, one of the largest in Europe.