Special Relativity. Lifetime.

[John 6IX Breezy]

@Breezy,
General relativity does that precisely - there is no global universal time a priori in general relativity. Special relativity unites space and time and mixes them up differently for different observers, not so much locations - however, in the GR description of spacetime everything is indeed localized. The extreme example are black holes where time stands still on the horizon as seen from outside, but runs on for someone falling in.

Hmm I see, the idea makes sense to me when time is divorced from the equation. Gravity would affect the way things move, and that's it; at the very least it slows you down when you jump. I'm not entirely sure I understand why an increase in gravity constitutes a slowing down of motion in a more pervasive way, but given that it does and it affects even your neurons, meaning you process information slower, it makes sense that near a black hole you see yourself as moving at normal speed and time, because your mind has slowed down along with your surroundings. You therefore perceive time outside the black hole as moving faster, because motion is unaffected out there. It sounds similar to how weightlessness is achieved by falling inside a plane that's also falling, your mind perceives it as floating.

Black holes, then, seem similar to moving in a pool full of water, where your movements appear slower to those outside of the pool. Perhaps the only difference is that water only affects the movement of your body, not your brain. As such your mind hasn't slowed down, and you can still experience your own body moving slower through the water. But if the pool did affect your neurons and slowed them down the way gravity does in a black hole, perhaps you would in fact feel as if you're moving normally through water while the outside world moves faster.