From my completely uneducated perspective, our visible universe is one white hole that is actually the inside of aunuverse mass black hole. The black holes we can observe are the exterior of other white holes. Like a space-time foam made of left and right time flowing bubbles. I remember seing some graphs that showed time and space switching places within black hole mathematic or something. Like time flow observed within seem reversed from our perspective.
From my completely uneducated perspective, our visible universe is one white hole that is actually the inside of aunuverse mass black hole. The black holes we can observe are the exterior of other white holes. Like a space-time foam made of left and right time flowing bubbles. I remember seing some graphs that showed time and space switching places within black hole mathematic or something. Like time flow observed within seem reversed from our perspective.