James Tiptree Jr. (Alice Bradley Sheldon), American psychologist and science fiction author (died 1987)

Alice Bradley Sheldon, better known as James Tiptree Jr., was an American science fiction and fantasy author. It was not publicly known until 1977 that James Tiptree Jr. was a pen name of a woman, which she used from 1967 until her death. From 1974 to 1985, she also occasionally used the pen name Raccoona Sheldon. Tiptree was inducted into the Science Fiction Hall of Fame in 2012.

August 24 is the 236th day of the year in the Gregorian calendar; 129 days remain until the end of the year.