The anti-universe also must be running back in time for the idea to work. If this were all true, both universes would expand by themselves without the help of dark energy.

According to Kumar, his universe–anti-universe model has implications beyond just the birth of our universe—as it may shine fresh light on several long-standing cosmological puzzles.

In this model, the anti-universe stretches backward in time from the Big Bang, mirroring the properties of our Universe with reversed spatial configurations and dominated by antimatter.

If an anti-universe exists, it would run backward in time, before the Big Bang. Dark matter, then, could be right-handed neutrinos implied by the mirror universe.

CPT symmetry and universe/anti-universe pairing: A fundamental symmetry in physics, known as CPT (charge, parity, and time reversal) symmetry, implies that processes occur in mirrored pairs.

The anti-universe would be off-limits to anyone who doesn't like their matter being instantly annihilated, even if we could access it. But assuming this were all true, ...

The anti-universe is a captivating concept that extends the understanding of symmetry, anti-matter, and the fundamental nature of the cosmos. While the idea remains largely theoretical, ...

The results apply equally to the partner anti-universe. To sum up, the accelerated expansion of the universe is a challenging subject that continues to drive scientific efforts.

"We need a partner anti-universe whose time flow is oppositely related to our universe." The Upside Down. The current model scientists use to explain the universe around us is made up of three ...