I had a meteorology instructor say, "Imagine that this planet is a basketball, the bumps are higher than Everest and the grooves deeper than the Marianas Trench but it will do. Now dip it in water and take it out. The film of water on the surface? That's the thickness of our breathable atmosphere."
I had a meteorology instructor say, "Imagine that this planet is a basketball, the bumps are higher than Everest and the grooves deeper than the Marianas Trench but it will do. Now dip it in water and take it out. The film of water on the surface? That's the thickness of our breathable atmosphere."