China's FAST Telescope Maps Over 156,000 Hydrogen Sources

China's Five-hundred-meter Aperture Spherical radio Telescope (FAST) has identified 156,411 neutral hydrogen sources across nearly half the sky. These findings, published in *Science China Physics, Mechanics & Astronomy*, are expected to offer significant insights into galaxy formation, evolution, dark matter distribution, and large-scale cosmic structures, advancing understanding of the early universe.