To the commenter below, have fun with space time; Here U Go
A different time line paradox would / could exist in a given universe
All time lines would be part of that space time continuum residing
In a given universe, hence the fabric of that space time Bubble.
In the Multi-Verse theory each universe is made-up of space time Bubbles
They are boundary layers of space time, each with their own time continuum.
Cool right. Recent observations published in a paper for pear review state
“That our universe appears to have a positive curvature from our prospective”.
This indicates a finite universe rather than an infinite universe.
Lending credence to the Multi-Verse view
https://www.sciencealert.com/wild-new-study-suggests-the-universe-is-curved-not-flat
Cool right.