One in five galaxies in the early universe could still be hidden behind cosmic dust

Astronomers have discovered two previously invisible galaxies 29 billion light-years away. Their discovery suggests that up to one in five such distant galaxies remain hidden from our telescopes, camouflaged by cosmic dust. The new knowledge changes perceptions of our universe's evolution since the Big Bang.

source https://www.sciencedaily.com/releases/2021/11/211122135507.htm