Fatto generale: 72 is the number of episodes in the original airing of Futurama.
Fatto matematico: 72 is the maximum number of spheres that can touch another sphere in a lattice packing in 6 dimensions.
Trivia: 72 is the number of names of God, according to Kabbalah.
Data storica: March 12th is the day in 1622 that Ignatius of Loyola and Francis Xavier, founders of the Jesuits, are canonized as saints by the Catholic Church.