Another theory about the Universe, called the Steady State theory, says that the Universe has always existed, and that the Universe is expanding and constantly creating matter as it expands.

Box 9. Steady-State Effects of Simultaneous 10 Percentage Point Increases in Ratios of Government Debt to GDP of All Industrial Countries ...

Others took up the big bang theory, and for several years there were strong debates between those supporting it and those who favored a "steady state" theory of the universe, in which the universe ...