Is spacetime real, or does it dissolve under scrutiny? | Philosopher Sam Baron argues that the idea of spacetime "emerging" from quantum reality is circular, leading to the radical conclusion that Einstein's spacetime does not exist.

Can finite observers force spacetime, gravity and the Standard Model? OPH is an open, auditable attempt with Lean proofs, simulations and explicit gaps. Math, Lean 4 & physics hackers: credentials optional; rigor mandatory. Star it. Pick an issue.

General Relativity Keeps Revealing Unexpected Spacetime Geometries That Go Far Beyond Everyday Intuition. In 1988, Kip Thorne and Michael Morris described a traversable Wormhole geometry that strangely connects two distant regions of Spacetime without an event horizon or central singularity. No traversable Wormhole has ever been observed. Within General Relativity, though, these solutions are mathematically valid if Spacetime is supported by exotic stress-energy that violates classical energy conditions. It's a solution Einstein’s field equations allow, but nature has not confirmed. #Einstein# #GeneralRelativity# #Wormholes# #Spacetime# #Physics# #Relativity#

In March, we released benchmark numbers alongside SpacetimeDB 2.0. After a thorough investigation, we discovered a serious error in SpacetimeDB which caused our results to be misleading. We would like to sincerely apologize to our community. Read the full article:

GPT-6 Astra made this blackhole renderer using C++, Vulkan and raytracing It implemented advanced Kerr spacetime math, tracing light bent from 211000 stars, frame dragging and relativistic color shifts It made it run at 1080p/~30 FPS in realtime high precision on a GTX 1050 ti

Oscillatory Quadrupole Distortions A direct visualization of the h₊ and hₓ polarization modes of gravitational waves propagating through curved spacetime around a black hole.

small group of philosophers has been assembling a radical alternative picture. | Philosopher and logician Samuele Iaquinto introduces Fragmentalism, a view on which spacetime is not a single, coherent whole, but rather a patchwork of incompatible perspectives.