Template:Are You Sure/February 17

• ... Dominican friar, philosopher, mathematician, poet, and cosmological theorist Giordano Bruno proposed that the stars were just distant suns surrounded by their own exoplanets; and raised the possibility that these planets could even foster life of their own (a philosophical position known as cosmic pluralism); and that Brune insisted that the universe is in fact infinite and could have no celestial body at its "center"?

• ... that mathematician Abraham Fraenkel published two papers in the 1920s which sought to improve Ernst Zermelo's axiomatic system, and that the result is the Zermelo–Fraenkel axioms?

• ... that No Escape From Telephones is a 1953 American science fiction thriller film about a police officer (Dick Tracy) who must bring a deranged computer (HAL 9000) to justice?