Earlier, I had just written letters in the sand. But this time, I needed a way to get the numbers onto something portable. My first plan was: Use a laptop!

Each crewman had their own laptop. So I have six at my disposal. Rather, I had six. I now have five. I thought a laptop would be fine outside. It’s just electronics, right? It’ll keep warm enough to operate in the short term, and it doesn’t need air for anything.

It died instantly. The screen went black before I was out of the airlock. Turns out the “L” in “LCD” stands for “Liquid.” I guess it either froze or boiled off. Maybe I’ll post a consumer review. “Brought product to surface of Mars. It stopped working. 0/10.”

So I used a camera. I’ve got lots of them, specially made for working on Mars. I wrote the bytes in the sand as they came in, took a picture, then transcribed them in the Hab.

It’s night now, so no more messages. Tomorrow, I’ll enter this into the rover and the geeks at JPL can take it from there.

• • •

A NOTABLE smell hung in the air of the makeshift Pathfinder control room. The ventilation system was not designed for so many people, and everyone had been working every waking moment without much time for personal hygiene.

“Come on up here, Jack,” said Venkat. “You get to be the most Timward today.”

“Thanks,” said Jack, taking Venkat’s place next to Tim. “Heya, Tim!”

“Jack,” said Tim.

“How long will the patch take?” Venkat asked.

“Should be pretty much instant,” Jack answered. “Watney entered the hack earlier today, and we confirmed it worked. We updated Pathfinder’s OS without any problems. We sent the rover patch, which Pathfinder rebroadcast. Once Watney executes the patch and reboots the rover, we should get a connection.”

“Jesus, what a complicated process,” Venkat said.

“Try updating a Linux server sometime,” Jack said.

After a moment of silence, Tim said, “You know he was telling a joke, right? That was supposed to be funny.”

“Oh,” said Venkat. “I’m a physics guy, not a computer guy.”

“He’s not funny to computer guys, either.”

“You’re a very unpleasant man, Tim,” Jack said.

“System’s online,” said Tim.

“What?”

“It’s online. FYI.”

“Holy crap!” Jack said.

“It worked!” Venkat announced to the room.

• • •

[11:18] JPL: Mark, this is Venkat Kapoor. We’ve been watching you since Sol 49. The whole world’s been rooting for you. Amazing job, getting Pathfinder. We’re working on rescue plans. JPL is adjusting Ares 4’s MDV to do a short overland flight. They’ll pick you up, then take you with them to Schiaparelli. We’re putting together a supply mission to keep you fed till Ares 4 arrives.

[11:29] WATNEY: Glad to hear it. Really looking forward to not dying. I want to make it clear it wasn’t the crew’s fault. Side question: What did they say when they found out I was alive? Also, “Hi, Mom!”

[11:41] JPL: Tell us about your “crops.” We estimated your food packs would last until Sol 400 at 3/4 ration per meal. Will your crops affect that number? As to your question: We haven’t told the crew you’re alive yet. We wanted them to concentrate on their own mission.

[11:52] WATNEY: The crops are potatoes, grown from the ones we were supposed to prepare on Thanksgiving. They’re doing great, but the available farmland isn’t enough for sustainability. I’ll run out of food around Sol 900. Also: Tell the crew I’m alive! What the fuck is wrong with you?

[12:04] JPL: We’ll get botanists in to ask detailed questions and double-check your work. Your life is at stake, so we want to be sure. Sol 900 is great news. It’ll give us a lot more time to get the supply mission together. Also, please watch your language. Everything you type is being broadcast live all over the world.

[12:15] WATNEY: Look! A pair of boobs! -> ( . Y . )