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Time can be considered to be the fourth dimension of reality, Used to describe events in three-dimensional space. It is not something we can see, touch, or taste, but we can measure its passage. Philosophers have debated the nature of time long before Einstein and modern physics. But in the 106 years since Einstein, the prevailing view in physics has been that time serves as the fourth dimension of space, An arena represented mathematically as 4D Minkowski spacetime. We see the world around us in three dimensions. Einstein predicted a fourth which he called space/time. He theorized energy from colliding black holes causes gravitational waves that pass through objects without changing. That makes them nearly possible to measure or prove that they exist.
