For over a century, Venus has concealed within its pale yellow clouds a substance that absorbs ultraviolet light in ways science cannot yet name. An international team has now reframed the question — not by seeking the identity of this hidden absorber, but by calculating precisely how powerful its light-absorbing properties must be, narrowing the field of what it could possibly be. The work does not resolve the mystery so much as sharpen its edges, eliminating false paths and setting quantitative demands that any true answer must satisfy. In doing so, it transforms an old enigma into a testabl