A new paper uses a simplified model to prove that gravity can be unified between quantum and standard physics. The simpler model still meets the established requirements for a robust unified gravity theory. Related Story The Standard Model of Particle Physics, ExplainedA gauge is a way to measure something that is comparable to other things, like India’s narrow gauge railways. In physics, gauge theory helps scientists take all the measurable things they know and align them in order to find commonalities or definitions. Any theory of unified gravity must hold up to how we measure the effects of gravity in our portion of spacetime—or anywhere else in the universe, for that matter.