Curiosity spikes fast when a dig meant to reveal palace walls instead exposes plumbing that looks surprisingly familiar. A team excavating ancient ruins in Xi’an uncovered a 2,400-year-old flush toilet built with inlet and drain pipes—technology far ahead of what many assume existed during China’s Warring States era. The idea of elite officials visiting a restroom with running water, long before Rome ever earned praise for aqueducts, adds a splash of humanity to a period known mostly for ritual and shifting power. Apart from kings and conquests, it seems that comfort and cleanliness mattered too.