A team of scientists has confirmed with unprecedented precision a fundamental hypothesis of physics, the equivalence principle. This principle states that all properties of mass are always the same relative to each other. If this were not the case, it would contradict Einstein's theory of relativity.

By analyzing 50 years of Lunar Laser Ranging data, the team found no effects that would contradict the equivalence principle. This means that the passive and active gravitational masses are equal to approximately 14 decimal places.

Simply put, these scientists used very precise data to confirm that Einstein's theory of relativity is correct, despite some conflicting predictions from quantum theory.