Amazing. I love that i didn't know this. When i was studying weather as part of my pilots license i noted the basic mental math that i'd lose ~2 degrees celsius per 1000ft, but never did i take a second to ask, what happens when i go up 28,000 km.

the article says 28.42 km. where are you seeing 28000 km ?

yeah i have no idea why my brain decided to type that (twice...), its clearly 28km