Faint Glow from Early Universe Offers New Method to Probe Dark Energy Mystery

Scientists are utilizing a faint radio emission from hydrogen in the early universe to develop a novel technique for understanding dark energy, the enigmatic force accelerating the universe's expansion. Data from the CHIME instrument indicates that approximately 2% of the universe's hydrogen was in neutral atomic form billions of years ago. By mapping the distribution and clustering of this hydrogen, researchers gain a new way to test theories of galaxy formation and evolution, potentially providing crucial insights into the nature of dark energy.