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aramis87@fedia.io ⁨3⁩ ⁨months⁩ ago

A time traveler's survival guide. The vertical green bars are the only times in Earth's history with enough oxygen to breathe (hypoxia) and low enough to avoid oxygen toxicity (hyperoxia):

https://fedia.io/media/cache/resolve/entry_thumb/fa/a9/faa97017c09ebf7d9543fece447951844e5cfbdaa9f491c95763102e987ffc59.jpg

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