https://en.wikipedia.org/wiki/Hyperoxia
This was a screenshot I took months ago while watching a Geology Hub upload on YT. It was a lightbulb moment for my understanding of mass extinction events, (the largest was 250ma). I’ve referenced this multiple times, so thought I might share. Perhaps you find it as interesting as I do.
Problem with time travel is all the miscalculations trying to hit the thin skin of a moving object. Don’t forget the undulations through the galactic arms and the effect of the galactic medium against the heliopause. Good luck! Never know, maybe you’ll be the first above ground and non orbital. Bring a parachute, ablation shield, a shovel, and say hello to Hawking!
P.S. If you get a chance, tell me to call in sick for work 2/26/14. I’d appreciate not being disabled in that alt timeline. Thx!