Why Time Slows Down Near a Black Hole - Leonard Susskind Explains

Time is not the same everywhere. Near a black hole, it slows down — not as a metaphor, not as an approximation, but as a measurable, physical, verified fact written directly into the equations of general relativity. In this video, Leonard Susskind explains exactly why this happens. Gravity is not a force pulling things down. It is the curvature of spacetime itself. And that curvature does not just bend space — it bends time. The deeper you fall into a gravitational well, the slower your clock ticks relative to someone far away. Near the event horizon of a black hole, time slows to a near stop. At the horizon itself, from the outside, it stops completely. Why Time Slows Down Near a Black Hole - Leonard Susskind Explains This is not science fiction. GPS satellites correct for this effect every single day. The Pound-Rebka experiment measured it across a 22-meter tower in 1959. And near Sagittarius A* — the black hole at the center of our galaxy — one year near the horizon could equal millions of years outside. The universe does not treat time as a constant. It never did. 🔔 Subscribe for physics that actually changes how you see reality. #blackhole #leonardsusskind #physics #timедilation #generalrelativity