Horace Levi Cain, Jr. (born 1900)

In 1900, in the year that Horace Levi Cain, Jr. was born, the German physicist Max Planck formulated an energy theory, postulating the existence of "quanta," which lays the groundwork for the quantum theory of modern physics. In December, he introduced a paper on the Planck postulate which stated that E=hv - the energy of a photon is proportional to its frequency times a constant. Planck won a Nobel Prize in 1918 for his work in theoretical Physics.

In 1924, J. Edgar Hoover, at the age of 29, was appointed the sixth director of the Bureau of Investigation by Calvin Coolidge (which later became the Federal Bureau of Investigation). The Bureau had approximately 650 employees, including 441 Special Agents. A former employee of the Justice Department, Hoover accepted his new position on the proviso that the bureau was to be completely divorced from politics and that the director report only to the attorney general.

In 1939, in May, Disney's Snow White and the Seven Dwarfs, the first full-length animated film, reached a total international gross of $6.5 million which made it (to then) the most successful sound film of all time. First released in December 1937, it was originally dubbed "Disney's Folly" but the premiere received a standing ovation from the audience. At the 11th Academy Awards in February 1939, Walt Disney won an Academy Honorary Award - a full-size Oscar statuette and seven miniature ones - for Snow White.

In 1971, in March, Congress passed the Twenty-sixth Amendment to the United States Constitution, which lowered the voting age to 18 (from 21). It was a response to the criticism that men could fight at 18, but not vote for the policies and politicians who sent them to war. The states quickly ratified the Amendment and it was signed into law on July 1st by President Richard Nixon.

In 1997, on June 26th, the first Harry Potter book by J. K. Rowling was released. "Harry Potter and the Philosopher's Stone" was an immediate success and spawned not only sequels but also movies, video games, plays, and amusement park attractions. J.K. Rowling, at the time of the first book a poor single mother, has become a multi-billionaire.