2026-08-04 21:25 UTC
When and how did Earth get its oxygen? The answer used to seem simple...but the more we learn, the more complicated it looks.
The path to breathable air may have been twisted by shifting continents & runaway glaciers.
https://www.science.org/content/article/what-triggered-one-most-dramatic-changes-earth-s-history #science #nature #history
Replies (1)
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@coreyspowell@mastodon.social 2026-08-04 21:25
Useful tip for time travelers: You'd need to bring breathing equipment with you for 90% of Earth history. Oxygen levels sufficient for human life did not exist until the Devonian era, around 400 million years ago. #science #history #earth