general_fact: 1848 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1848 is the smallest value of n for which _{2n}C_{n} is divisible by n^{2}.
trivia: 1848 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: January 21st is the day in 1954 that the first nuclear-powered submarine, the USS Nautilus, is launched in Groton, Connecticut by Mamie Eisenhower, the First Lady of the United States.