Space-Time Fabric • It is widely believed that nature has four universal forces such as Electromagnetic force, Weak Nuclear force, Strong Nuclear force and Gravitational force. However, according to general relativity theory, Gravity is not a force like others rather it's an effect that makes curvature on space-time fabric or other words gravity is not a force but the curvature of space-time around the object. • Furthermore, the Theory of Relativity tells us about the dimensions of our universe