Black Holes: Where Spacetime Breaks
Black holes aren't just exotic objects — they're places where our best theories stop working. The singularity isn't just a dense point in space; it's a crack in the mathematical structure of reality.
foundations
General Relativity: Gravity Is Geometry
Newton said gravity was a force. Einstein said gravity doesn't exist — only curved spacetime. General relativity isn't a correction to Newtonian mechanics; it's a completely different picture of reality.
Special Relativity: Why Nothing Outruns Light
Einstein started with one weird postulate: light travels at the same speed for everyone, regardless of how fast they're moving. Everything else — time dilation, length contraction, E=mc² — follows from that single, stubborn fact about the universe.
The Physics of Space and Time
Space and time were separate in Newton's universe. Einstein fused them, made them dynamic, showed that matter curves them. Now we're asking whether they're fundamental at all — or emergent from something stranger. This series tracks that story.