The nature of space is still a subject of scientific inquiry and debate. In classical physics, space is often treated as a continuous entity, meaning it can be divided into infinitely smaller and smaller units without a fundamental limit. This viewpoint has been quite successful in describing many physical phenomena.
However, when it comes to the nature of space on extremely small scales, such as those encountered in quantum physics, some theories suggest that space might have a discrete or granular structure. In certain speculative theories, space is thought to be composed of tiny, indivisible units often referred to as "quantum foam" or "Planck-scale pixels." These theories propose that at the most fundamental level, space is not continuous but rather made up of discrete building blocks.
It's important to note that the precise nature of space is still an active area of research and exploration in physics. As our understanding of the universe continues to evolve, scientists are continually investigating and refining our understanding of the fundamental nature of space.