Can we live there instead?
on the study says predictions for that constant are a lot slower than what we've measured in reality, and scientists are trying to figure out what's causing the discrepancy. They say the cause could be a mirror world we can't yet see.
"This might provide a way to understand why there appears to be a discrepancy between different measurements of the Universe’s expansion rate," researchersScientists have long built models of the cosmos. Now the task is to create one that doesn't violate any of the rules cosmological rules we've learned so far.
"This might seem crazy at face value, but such mirror worlds have a large physics literature," study co-author Francis-Yan Cyr-Racine said in the statement. "Our work allows us to link, for the first time, this large literature to an important problem in cosmology."