Now imagine that this photo is transformed into a short video. The T-Rex&#39;s mouth opens wider, and its roar becomes louder and more intense. The ground shakes, and the trees sway in the wind. The T-Rex&#39;s eyes flash with anger, and its teeth glint in the sunlight.  The video is only a few seconds long, but it is incredibly realistic and immersive. It is as if the viewer is standing right there, witnessing the T-Rex&#39;s roar firsthand.