I was just wondering what the Flat-Earth atmosphere is made of? I mean, the Round-Earth atmosphere is something like 800km. The Troposphere which is where we live (the blue one) is 18km and the Stratosphere goes up to 50km. Our ultra-thick atmosphere protects us from space-debris, meteors, and UV rays from the Sun and left over microwaves from The Big Bang.
My question is this; How does the Flat-Earth atmosphere protect us from all of this, if it is only 150ft (46m) high? And it's just air. What? No ozone? Actually, that sort of brings up another question.
I honestly don't know how large the atmosphere is. 150ft? That seems like an arbitrary number to me. I'm sure someone has expoused it before, but for me, I wouldn't know.
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Also, what is space in the Flat-Earth universe? I mean, it can't be entirely pressureless like the Round-Earth universe, because then the Ice Wall would sublime from the outside, eventually cracking under the fabled pressure that created it. So space must actually have pressure. So what is space made of that gives it the pressure required to sustain the Ice Wall?
I don't believe in the ice wall. It may exist. It may not.
OK, so hopefully any attempts at sarcasm are blatantly obvious.
Yup.

I, personally, believe the Earth is round (call me crazy... - um... I guess some of you actually will), but I also am mildly interested in how it is that the current world model works in a flat world. I mean, I want to know everything about the world and the universe. I want to know why the sky is blue, I want to know why volcanoes erupt, etc.
Air molecules absorb different wavelenghts of light differently. High frequencies (blues) more commonly. These get emited later, in a different direction, causing a diffuse blue glow in the air.
Volcanoes are more complicated. There's these plates... and maybe a table? And lines that are someones fault.
Yes, I'm joking.
But, then I come here, to The Flat Earth Society and I see people who are content to say the Earth is like this and that's that. I find it so frustrating that you don't know and don't attempt to find out the answers to these questions yourselves by boating to the Ice Wall to see it for yourself or by raising money for independent research into the effects of Flat-Earth pseudo-gravity.
Right, well, I'll get right on that as soon as I get (A) the money and (B) a reputable scientist that'd actually do that.