Hello everyone! My question is this: Do we believe time is a constant and forces such as gravity affect our perception of time? Or do we believe that time itself is being slowed down by forces such as gravity? I ask this because I had an interesting thought while driving to work. If time is a requirement for change, then how would the big bang be possible if time was a property of our universe specifically (i.e gravity slowing down time)? Wouldn't time need to exist outside of our universe, and if so, how can our universe slow it down?