Fatto generale: 56 is the number of layers of the Universe according to Aristotle (Earth plus 55 crystalline spheres above it).
Fatto matematico: 56 is the sum of the first six triangular numbers (making it a tetrahedral number), as well as the sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17).
Trivia: 56 is the number of consecutive games in baseball in which New York Yankees' Joe DiMaggio had a base hit in 1941, still a record.
Data storica: February 25th is the day in 1933 that the USS Ranger is launched.