The nature of space is a philosophical and scientific inquiry that seeks to understand the fundamental characteristics and properties of the space in which the universe exists. In classical physics, space was often considered as an empty, three-dimensional framework in which objects and events occur. However, the theory of relativity, developed by Albert Einstein, introduced a new understanding of space as a dynamic, four-dimensional spacetime that can be influenced by the presence of matter and energy. This theory revolutionized our conception of space, showing that it can warp, curve, and affect the paths of objects and light. Philosophically, questions about the nature of space touch on issues of realism, such as whether space is an objective entity or a conceptual framework. The nature of space is also connected to questions about the geometry of the universe, its curvature, and the fabric of spacetime itself.