link original: https://www.youtube.com/watch?v=EYPtfKUMoQk
This theory has far-reaching implications and has changed our perceptions of space and time. What Physicists discovered is that we are all continuously moving not just in three-dimensional space but in four-dimensional spacetime. In a similar way, all objects in the real world are moving in a four-dimensional spacetime, at a constant velocity as that of light. Sounds astounding but it’s true.