Not concrete proof that there is a a parallel universe near us, but particles have been found in Antarctica which currently go against what we hold to be true, according to the laws of physics. https://www.forbes.com/sites/jamiecartereurope/2020/05/21/has-nasa-found-a-parallel-universe-where-time-flows-backwards-the-truth-behind-the-headlines/ Tabloids jumped the gun, saying that the experiment shows that when the Big Bang happened, it may have created two universes at the same time, one where particles flow one way, and time moves forward, and in the parallel one, these particles flow backwards, and time moves backwards with them.