What Is Quantum Gravity?

Quantum gravity is a field of theoretical physics that attempts to reconcile the theories of quantum mechanics and general relativity. It aims to describe the behavior of gravity at the smallest scales, where the effects of quantum mechanics become significant. The main challenge in developing a theory of quantum gravity is that the two existing theories, quantum mechanics and general relativity, are fundamentally incompatible. A successful theory of quantum gravity would provide a complete and self-consistent description of the interactions between matter and energy, including gravity, at all scales. Currently, there is no widely accepted theory of quantum gravity, and it remains one of the biggest open questions in physics.