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*** It's also noteworthy that beans and peas are a lot more fragile compared with potatoes. One of the reasons why potatoes are a staple food source in rocky terrain and mountainous environments is because they are much, much hardier than most other food sources relative to their calorie count. They can survive on less nutrient-rich soil and with less water. They're probably the only plant that could survive in Mark's improvised farm with the water he has available through his furnace.

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** This is all very easily answered if you actually read the part of the book where Watney explains how he's storing the potatoes he's harvested.
--> '''Mark''': You may be wondering how I'll store them. I can't just pile them up; most of them would go bad before I got around to eating them. So instead, I'll do something wouldn't work at on Earth: throw them outside. Most of the water will be sucked out by the near-vaccum; what's left will freeze solid. Any bacteria planning to rot my taters will die screaming.


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** When the crew is told that Mark is alive, in both the book and the movie Mitch Henderson also tells them their emails were being censored. They didn't find out sooner, because nobody want to ruin their lives to smuggle the information to them. Meanwhile for the Rich Purnell manouvers, there wasn't any public knowledge the crew wasn't supposed to know, so nobody was going through personal emails to censor them. Which meant Mitch could slip them the information under the guise of being a personal email, because nobody would be checking the contents before it was sent.



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** And NASA was rightfully worried about the crew's mental state. They had eleven months of space travel ahead of them, and if they lose their composure they might die. Do you seriously think that ''the day after Watney's death'' NASA would want his best friends to photograph his dead body and then do the entire trip back to Earth with those pictures on their computer? Really? You really don't think anyone in NASA would have objections to that plan?


[[folder: Taiyang Sheng]]
* In the book, after deciding to give their booster to NASA, the Chinese space program mourns the probe it was supposed to be used for (a solar study I think?), and agrees that having a Chinese crewman on a future Ares mission is a piss poor trade. They're mainly upset at the loss to science, as they barely got the funding for the original booster and will never be able to send their probe out now. If only they knew a space organization that owes them a rocket booster and would be pretty interested in the results of a new space research. If NASA can repay them with a crewman on an Ares mission, what's stopping them fron saying "Thanks, but it'd be better if you could spot us a new booster for our solar probe, and we'll let you see the results too since you helped". After the good PR of the two space agencies working together to save Watney, neither government woukd want the backlash of banning future collaboration.

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[[folder: Taiyang Sheng]]
Shen]]
* In the book, after deciding to give their booster to NASA, the Chinese space program mourns the probe it was supposed to be used for (a solar study I think?), and agrees that having a Chinese crewman one of their taikonauts on a future Ares mission is a piss poor trade. They're mainly upset at the loss to science, as they barely got the funding for the original booster and will never be able to send their probe out now. If only they knew a space organization that owes them a rocket booster and would be pretty interested in the results of a new space research. If NASA can repay them with a crewman on an Ares mission, what's stopping them fron CNSA from saying "Thanks, but it'd be better if you could spot us a new booster for our solar probe, and we'll let you see the results too since you helped". After With how much the good PR of the two space agencies working together world loved CNSA and NASA collaborating to save Watney, neither it's not like either government woukd would want the backlash of banning future collaboration.from saying no.

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[[/folder]]

[[folder: Taiyang Sheng]]
* In the book, after deciding to give their booster to NASA, the Chinese space program mourns the probe it was supposed to be used for (a solar study I think?), and agrees that having a Chinese crewman on a future Ares mission is a piss poor trade. They're mainly upset at the loss to science, as they barely got the funding for the original booster and will never be able to send their probe out now. If only they knew a space organization that owes them a rocket booster and would be pretty interested in the results of a new space research. If NASA can repay them with a crewman on an Ares mission, what's stopping them fron saying "Thanks, but it'd be better if you could spot us a new booster for our solar probe, and we'll let you see the results too since you helped". After the good PR of the two space agencies working together to save Watney, neither government woukd want the backlash of banning future collaboration.

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** This troper can attest from personal experience that smooth rocks make an acceptable substitute for toilet paper.

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** He wouldn't want to burn paper in case he needed it for toilet paper! (see above)

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** In the real-world, Space Exploration Technologies had just started ISS resupply flights at the time Weir began writing. As to the booster availability: Mars and Earth were not in good positions to make a fuel-conserving Hohlmann transfer, which is shorter. As any "Kerbal Space Program" player will tell you, you can "brute-force" an encounter with another planet, but that requires much, much more fuel, which was why only ULA's largest booster were needed. (A fictitious one: The "Delta IX" doesn't exist.) Weir also likely knew that ULA (or as their partner entities Boeing and Lockheed Martin) fly the ''only'' boosters which have sent practically every NASA probe to-date to Mars. No other launch provider Weir knew of at the time has boosters with sufficient brute-force power. China would be a logical alternative for a heavy booster as real-world shows they are continuing increasing their launch vehicle power, and that's because they barred from interaction with the US space program for political reasons since the 1990s.

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** In the book, Watney goes through his food rations to note what he can grow. He finds beans and peas but chooses the potatoes because they had more calories. After the Hab breech, around Sol 116, with the potatoes flash-frozen to death, it's probable that Mark has already eaten the beans and peas, realized they couldn't germinate, or would not be worth the effort to grow enough of them for food in the time available, revived soil bacteria or not. Mark never cleans out the Hab's soil in the book. As for the soil's presence after the farm's loss: Mark's back is always bugging him in the book, and getting soil into the Hab with small sample shovels was what starts that running joke. He notes that he wouldn't bother to remove the soil for those reasons.

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** The rover balloon in the film is a plot hole. The film shows two rovers, but one is hopelessly trashed so we see Watney using only one rover throughout the film. This is likely a budget matter as we likely saw the same rover prop. But in the book, Rover 1's parts are salvaged often for Rover 2, the "Watneymobile" which is his main ride. To get to the Ares IV MAV, book-Mark transforms Rover 1 into the "trailer" for his life support. He has to cut the hole in the roof of Rover 1 to fit the large oxygenator and atmospheric regulator, handwaved in the film and not appearing inside the film's rover interior. Book-Watney had no crane or flat-top trailer like that in the film. Not only was the film's balloon unnecessary, it becomes a science gaffe. When Watney leaves, his rover door is open to the thin Martian atmosphere (the film version has no airlocks as the book's rovers) and the balloon appears ''fully inflated.''


* At some point they sent a new subroutine that would allow the rover to communicate with Pathfinder; it's estimated to be at least 20M. That's at least a few songs in MP3 with a decent quality.

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* At some point they sent a new subroutine that would allow the rover to communicate with Pathfinder; it's estimated to be at least 20M. That's at least a few songs in MP3 [=MP3=] with a decent quality.


** I'm not good at these things. I needed to be sure.

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** I'm not good at these things. I needed to be sure. There's no need to be rude about it, I was just a little confused,



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* At some point they sent a new subroutine that would allow the rover to communicate with Pathfinder; it's estimated to be at least 20M. That's at least a few songs in MP3 with a decent quality.

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** I'm not good at these things. I needed to be sure.

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** You seriously couldn't tell? It's '''''obviously''''' days, because the other two options you present mean he'd be stuck on Mars for either ''47 years'' or '''five centuries'''.

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