Scar tissue is made of a protein called collagen
Cold air will underlie warmer air at higher altitudes. :^)
Hope this helps!
The medicine want advanced enough to fight off the sicknesses and doctors weren't very knowledgeable
Well CO2 levels are high , and that’s a shift in their reaction. so i suppose when the person is sleeping their CO2 levels are lower so if there is an answer asking if it’s lower then press that if not i don’t know i’m sorry :/. if you ever need anything else DM me lol