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+-SH safe2268649 +-SH artist:foldeath198 +-SH artist:pencils1416 +-SH limestone pie6584 +-SH princess celestia117045 +-SH princess luna121755 +-SH rainbow dash290919 +-SH twilight sparkle371463 +-SH oc998825 +-SH oc:moonglow twinkle43 +-SH oc:sky shatter35 +-SH alicorn336170 +-SH earth pony546279 +-SH pegasus537164 +-SH pony1701277 +-SH unicorn582109 +-SH comic:anon's pie adventure501 +-SH g42127558 +-SH armor33049 +-SH bow48855 +-SH cave4938 +-SH comic140605 +-SH cracking joints17 +-SH crown32700 +-SH eye contact7864 +-SH female1910303 +-SH flying58725 +-SH frown38498 +-SH glasses95706 +-SH gritted teeth20690 +-SH happy47274 +-SH jewelry125250 +-SH looking at each other38370 +-SH male586267 +-SH mare806843 +-SH moonbutt5585 +-SH necklace35451 +-SH pain star196 +-SH regalia40302 +-SH scrunchy face8430 +-SH sitting100190 +-SH smiling432127 +-SH speech bubble44120 +-SH stallion211601 +-SH tail bow10487 +-SH thought bubble5917 +-SH twilight sparkle (alicorn)154902 +-SH wing cramp3
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If this does not happen, Mr. Artist it would be within everyone best interest that you draw in the blank image that most of us in the comments oh so desire. :D
Oh my~
Yeah, but how long will it be till the overeager stallion realizes “Wait, Princess Celesia has been single how long?” and tries to give her immediate male comfort?
I’m sure the princess realizes this too.
Hm, I wonder. Homage to ?
Because it really fits Dash.
uh oh, and dash is coming to them with some news…
thank you foldeath, excellent colors.
It’s too bad we can’t up-vote comments. This made made me laugh out loud. xD
Ha
@Background Pony #5F3F
@Cube_Effect
A mammal needs X molecules of oxygen per minute to support its life and activity. As the pressure drops, the space between the molecules becomes larger. However, the space within the rib cage stays within finite bounds (inhalation vs. exhalation). The pressure outside the ribs and the pressure inside the trachea are the same. So moving air in and out of the lungs actually gets easier at higher altitudes; the air weighs less per lungful, and the space between the molecules means the molecules interact less and have less friction drag. However, you’re moving air with huge spaces between the oxygen molecules, so each breath brings in less oxygen. Making matters worse, the binding capacity of hemoglobin depends on the partial pressure of the oxygen. That’s why hyperbaric oxygen can be used to treat carbon monoxide poisoning; even though CO has a much stronger bond to hemoglobin than oxygen does at atmospheric pressure, pressurized oxygen can displace CO from its bond to the hemoglobin. But if total pressure drops 50%, it means oxygen partial pressure drops 50%, and the blood can’t carry as much oxygen. So the net effect is breathing at a constant rate would become easier, but you have to do it twice as fast. And even if you do not a lot of the oxygen gets into your blood.
Why not breath pressurized oxygen? Because the air pressure around your ribs is still lower. Every breath in would be easy, but every breath out would be a struggle like blowing up a stiff balloon at best; impossible to force out at all at worst. You need to be put into a pressurized container, so that the space between the oxygen molecules is reduced, and so the pressure around your ribs and inside your lungs is the same. On the Moon, where the gravity is also very small, or in a plane like the SR-71 where you just have to sit there and move your arms and feet a little, you can wear a pressurized container. But wearing a full spacesuit in Earth gravity would make climbing a mountain even harder than barely being able to breathe does. (The F-22 Raptor uses a different solution to let its pilots survive at 20,000m. Compressed air from the engine’s intake turbine is routed into a zeolite resin cartridge that binds up all the nitrogen, leaving mostly pressurized oxygen behind. The pilot breathes that pressurized oxygen through his helmet mask. To help him breathe out, his flight suit mechanically squeezes his chest cavity, making up for the lack of air pressure around his ribs, and enabling him to fight the oxygen pressure in his trachea. Of course, carrying a tank of compressed pure oxygen big enough to last the entire hike (or an engine, so you can keep making pressurized oxygen as you go), and a power source for the squeezing garment, wouldn’t be any easier than hiking in a spacesuit. And prolonged use of it can lead to temporary collapse of some of the lung’s alveoli. The air pressure in the lungs and the vest pressure outside the chest match, but the skin is still unpressurized, so blood and fluid sandwiched between the air and the ribs gets squeezed out of the lung’s walls into the rest of the body.)
tl;dr version, Twilight’s absolutely right.
same thing
holy sh*t how can i do that
I could like set it to 69 years from now
Edited
She isn’t wrong. As you go up a mountain, the air becomes less compressed and is therefore thinner.
why the other edits doe
“It’s magic I ain’t gotta explain shit.”
I’m glad you point out things we failed to notice so we can better think up crazy theories.