Ryan Collison

We have two theories of physics that each work better than anything before them, and they contradict each other on the nature of spacetime. This synthesis maps what we know, what's contested, and what unification would actually require.

Two theories. Both tested to extraordinary precision. Neither compatible with the other. Quantum gravity is the 100-year-old problem at the center of modern physics — and string theory, loop quantum gravity, and a dozen other candidates are still competing for the answer.

Many-Worlds isn't fringe — it's the interpretation many physicists prefer precisely because it requires no collapse, no observer, no special rules. The problem is it predicts nothing you couldn't predict without it. Is that a feature or a fatal flaw?

The Alcubierre Drive: Warp Speed Without Breaking Laws Series: Spacetime Physics | Part: 6 of 9 Primary Tag: FRONTIER SCIENCE Keywords: Alcubierre drive, warp drive, faster-than-light, exotic matter, spacetime manipulation Nothing can travel faster than light. This is usually stated as a fundamental limit, derived from special relativity. But that statement

The physics of time travel isn't forbidden — it's constrained. General relativity allows closed timelike curves, and the Novikov self-consistency principle resolves the grandfather paradox. The real barrier isn't logic; it's engineering something that bends spacetime.