The block universe: https://plus.maths.org/content/what-block-time

Apocryphon · on March 17, 2023

Is it the same thing as the holographic universe theory that was in vogue a couple of decades ago?

icegreentea2 · on March 17, 2023

No. The block universe is that 3+1D spacetime "exists all at once". We just happen to experience travelling through it in one way.

Holographic universe is that the physics and information in a 3+1D space time could be encoded into a 2+1D universe (with it's own physics).

Apocryphon · on March 17, 2023

Ah, Discover had an issue about that as well