The Big Bounce is a cosmological theory suggesting that the universe undergoes a series of expansions and contractions. Instead of a singular beginning, like the Big Bang, the universe could have experienced a previous collapse, leading to a new expansion phase. This cycle may repeat indefinitely, with each bounce creating a new universe. In this model, the universe's current expansion could eventually slow down, leading to a contraction phase. During this contraction, galaxies and matter would come together, ultimately resulting in a new bounce. This idea challenges traditional views of cosmic evolution and offers an alternative perspective on the universe's lifecycle.