Astronomers detect mysterious cosmic 'hum' possibly from ancient dark stars

Across the vast architecture of spacetime, gravitational-wave observatories have been listening to something they were not built to hear — a persistent, low-frequency hum with no clear origin in our current understanding of the cosmos. New research raises the possibility that this signal is a fossil echo from the universe's earliest moments, generated by hypothetical 'dark stars' that may have lived and died 13 billion years ago, powered not by nuclear fire but by the annihilation of dark matter itself. If confirmed, what we are hearing is not noise, but memory — the universe still reverberati