Just a few hundred million years after the Big Bang, the universe was a dark and simple place. There were no galaxies like the Milky Way, no planets, and no heavy elements such as carbon or oxygen. Instead, vast clouds of primordial hydrogen and helium drifted through space, slowly falling into...
Source: [Phys.org](https://phys.org/news/2026-06-primordial-halo-simulations-reveal-cosmic.html)