Multiple timelines simultaneously in the universe sounds like an out there concept.  We covered the topic of a parellel universe the the parallel timeline theory flows a bit differently.  Here is a bit more on the topic:

Renowned physicist and author Brian Greene, takes us to the frontiers of physics to see how scientists are piecing together the most complete picture yet of space, time, and the universe. With each step, audiences will discover that just beneath the surface of our everyday experience lies a world we’d hardly recognize—a startling world far stranger and more wondrous than anyone expected.

Brian Greene is going to let you in on a secret: We’ve all been deceived. Our perceptions of time and space have led us astray. Much of what we thought we knew about our universe—that the past has already happened and the future is yet to be, that space is just an empty void, that our universe is the only universe that exists—just might be wrong.

Let’s see if this is possible or too out there in the video on page 2

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