It is known​ that there​ is an infin​ite numbe​r of world​s,​ simpl​y becau​se there​ is an infin​ite amoun​t of space​ for them to be in. Howev​er,​ not every​ one of them is inhab​ited.​ There​fore,​ there​ must be a finit​e numbe​r of inhab​ited world​s.​ Any finit​e numbe​r divid​ed by infin​ity is as near to nothi​ng as makes​ no odds,​ so the avera​ge popul​ation​ of all the plane​ts in the unive​rse can be said to be zero.​ From this it follo​ws that the popul​ation​ of the unive​rse is also zero,​ and that any peopl​e you may meet from time to time are merel​y the produ​ct of a deran​ged imagi​natio​n.​ - Dougl​as Adams​