Fait général: 1728 is braces were first invented by Pierre Fauchard.
Fait mathématique: 1728 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 1728 is braces were first invented by Pierre Fauchard.
Date historique: September 23rd is the day in 1959 that the MS Princess of Tasmania, Australia’s first passenger roll-on/roll-off diesel ferry, makes her maiden voyage across Bass Strait.