minus-squareFrostyCaveman@lemm.eetoCool Guides@lemmy.ca•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).linkfedilinkEnglisharrow-up7·11 days agoThanks! I’ve always wondered about this. From the comments though, it sounds like there’s a few caveats with what “breathable” really means. Very very interesting. linkfedilink
minus-squareFrostyCaveman@lemm.eetoCool Guides@lemmy.ca•A cool guide for Signs of ADHD that were Missed in our ChildhoodlinkfedilinkEnglisharrow-up4arrow-down1·1 month agoThey think that’s just normal… … because these things are genetic linkfedilink
Thanks! I’ve always wondered about this. From the comments though, it sounds like there’s a few caveats with what “breathable” really means. Very very interesting.