Metric Tensor | The Curvature of Space

According to general relativity, we live in a four dimensional universe. Three dimensional space plus one dimensional time, known as spacetime. Human beings are 3D creatures, but are we able to perceive a four dimensional spacetime from a 3 dimensional perspective? Today, we are going to answer this question, and unveil the true nature of curvature in our universe. All in 8 minutes.