These are regions where massive gravity meets tiny scales. A quantum theory of gravity is needed to understand what happens at their centers.
Solving quantum gravity isn't just about finishing a math problem; it's about understanding our origins. Foundations of Quantum Gravity
Instead of strings, LQG suggests that space itself is made of discrete "loops" woven together. In this view, space is not a container but a network of relationships. These are regions where massive gravity meets tiny scales