math_fact: 58986 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 58986 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: June 30th is the day in 1905 that Albert Einstein publishes the article On the Electrodynamics of Moving Bodies, in which he introduces special relativity.