Learn how to visualize four-dimensional shapes, and see a massive, real-life “hypercube”: http://curiosity.im/4DimensionalShapes | Curiosity

574K views · 11K reactions | What is spacetime really? Explained in 30 Seconds In just 30 seconds, we break down how Einstein’s metric tensor shapes geodesics and governs the motion of objects through a four-dimensional Hausdorff manifold. A clear, no-nonsense explanation for advanced minds. #einstein #spacetime #generalrelativity #physics #math #gravity #space #astrophysics #science | Academic Avengers | Facebook