In a recent study at Veritas beamline, researchers from Uppsala University in Sweden observed parity-forbidden transitions to electronic states in an oxygen molecule due to interference analogous to Young’s double split experiment (YDSE). The findings, published in Science Advances, may change the way spectral data is interpreted for RIXS experiments and refine the conventional wisdom in synchrotron science for the interplay of photons with the dynamics of atomic nuclei in molecules.