Quantum chemists are throwing away important data ( , ) because standard quantum mechanics does not allow their interpretation. Many-Worlds quantum mechanics ( , ) can interpret this data. Standard quantum mechanics and Many-Worlds quantum mechanics are neither mathematically nor experimentally equivalent because they differ on the meaning of the wave function ψ. By analyzing the unused data, quantum chemists can also make a major contribution to understanding basic reality by confirming the existence of the Many-Worlds. The last time chemistry made a central contribution to physics was in 1925, when Pauli introduced the exclusion principle in order to explain the periodic table , and many physicists think that chemistry is merely applied quantum mechanics. It is time chemists once again show physicists that chemistry can establish theories of physics.