Time...beyond Pink Floyd

"The distinction between the past, present and future is only a stubbornly persistent illusion." So said Albert Einstein. Our universe is huge but finite. Some physicists believe that ours is only one of untold multiverses. In other universes, our laws of physics may not apply. For instance, time may run in reverse instead of forward or all of time may be occurring at once or in no particular order...or time may exist in a loop. As my mother used to say, "Think about stuff like that too much and you'll go crazy." But still, it's fascinating to think about.