The holographic principle is that we can describe everything about the universe, including gravity and depth, by talking about whats happening on the 2D surface.

There are suggestions that life could not take place in a 2D (plus time) universe, meanwhile, because of insufficient complexity. The main argument, which would make 2D universes a non-starter, ...

Is the universe truly 3D—or just a hologram? The holographic principle flips reality on its head, suggesting our world may be ...

Astronomy A spinning universe could crack the mysteries of dark energy and our place in the multiverse. Black Holes 'This is the holy grail of theoretical physics.' ...