ChinaA starless cloud weighs 130 million suns.

Standard dark matter theory predicts such starless halos, yet only 1 has been confirmed.

China’s giant radio telescope measured 500,000 solar masses of hydrogen, and deep optical images found no stars, leaving dark matter as the bulk.

The team cannot rule out an ultra-faint galaxy hidden below the optical survey’s brightness limit.

The paper, posted to arXiv on 24 September, has not been peer reviewed.

How each outlet framed it
Phys.org
emphasizes the 500,000 solar-mass HI cloud as a RELHIC candidate, explaining the dark-galaxy theory via ΛCDM and UV reionization

Sources: Phys.org