<< Astronomers accidentally discovered the footprints of a monster galaxy in the early universe that has never been seen before. Like a cosmic Yeti, the scientific community generally regarded these galaxies as folklore, given the lack of evidence of their existence, but astronomers in the United States and Australia managed to snap a picture of the beast for the first time. >>
<< An open question is exactly how many of them there are. >>
Cosmic Yeti from the dawn of the universe found lurking in dust. University of Arizona. Oct 22, 2019.
https://m.phys.org/news/2019-10-cosmic-yeti-dawn-universe-lurking.html
Christina C. Williams, Ivo Labbe, et al.
Discovery of a Dark, Massive, ALMA-only Galaxy at z ~ 5–6 in a Tiny 3 mm Survey. The Astrophysical Journal, Volume 884, Number 2. Oct 22, 2019.
https://iopscience.iop.org/article/10.3847/1538-4357/ab44aa
