But Earth's atmosphere wasn't always like it is today, and scientists predict that in the future, it will revert back to one that's rich in methane and low in oxygen.
Lengthening days are linked to the oxygenation of Earth's atmosphere, according to a study from 2021.
Microbes could have performed oxygen-producing photosynthesis at least one billion years earlier in the history of the Earth than previously thought.
New research shows that GJ 1132b might possess a thin, oxygen atmosphere — but no life due to its extreme heat.
