June 13, 1983
NASA's spacecraft, The Pioneer 10, became the first craft to exit the solar system.
Today is
World Softball Day
Why is this hard ball called "softball"?
Because the ball was initially soft when it was invented in 1887, and it was not until 1926 that the ball got its official name "softball."
The outside may be hard, but the ball's core is typically made of a softer cork and rubber blend, hence the name.
June 13, 1948
Dazai Osamu (太宰治), the Japanese writer, died at age 38 (suicide.)
His last book, No Longer Human (《人间失格》), is his most popular work outside Japan.