Researchers have identified a hidden crater in Hapcheon, South Korea, which could be pivotal in understanding a major event in Earth's history: the rise of oxygen.
The discovery includes fossil-like stromatolites, which are layered structures formed by ancient microbial life, suggesting a link to early oxygen production.
These findings may help clarify the conditions that contributed to the development of oxygen-producing life, marking a crucial turning point in the planet's evolution.