ANTI-UNIVERSE

A new cosmology model suggests that our Universe has a mirror image in the form of an "anti-universe" that existed before the Big Bang. From a certain vantage point, our Universe looks off-balance. Time runs forward as space expands, and there's more matter than antimatter. This seems to violate a fundamental symmetry, called CPT Symmetry, that says physics is unchanged when time, space, and matter-antimatter are all flipped. To balance out the cosmos, it has been proposed that the Big Bang was also the starting point of an anti-universe, where time runs in the opposite direction and antimatter dominates. Research shows that such a CPT-symmetric model is not only consistent with the known cosmic expansion history but also provided a straightforward explanation for dark matter. The CPT-symmetric model is an alternative to inflation, which assumes that the Universe went through a brief epoch of exponential growth right after the Big Bang. This rapid expansion can explain certain cosmological observations, but it requires the existence of additional, still hypothetical quantum fields. This new proposal can explain early cosmic evolution without inventing new physics. In the CPT- symmetric model, time and space flow continuously across the Big Bang, and the anti-universe that emerges in the negative time direction behaves like a mirror reflection of our Universe.