After the storm abated, the lone remaining astronaut performed a full inspection of the Hab. But he didn’t notice anything amiss. The weak part of canvas was concealed by a seal-strip.

Designed for a mission of thirty-one sols, AL102 continued well past its planned expiration. Sol after sol went by, with the lone astronaut traveling in and out of the Hab almost daily. Airlock 1 was closest to the rover charging station, so the astronaut preferred it to the other two.

When pressurized, the airlock expanded slightly; when depressurized, it shrunk. Every time the astronaut used the airlock, the strain on AL102 relaxed, then tightened anew.

Pulling, stressing, weakening, stretching…

LOG ENTRY: SOL 119

I woke up last night to the Hab shaking.

The medium-grade sandstorm ended as suddenly as it began. It was only a category three storm with 50 kph winds. Nothing to worry about. Still, it’s a bit disconcerting to hear howling winds when you’re used to utter silence.

I’m worried about Pathfinder. If the sandstorm damaged it, I’ll have lost my connection to NASA. Logically, I shouldn’t worry. The thing’s been on the surface for decades. A little gale won’t do any harm.

When I head outside, I’ll confirm Pathfinder’s still functional before moving on to the sweaty, annoying work of the day.

Yes, with each sandstorm comes the inevitable Cleaning of the Solar Cells, a time-honored tradition among hearty Martians such as myself. It reminds me of growing up in Chicago and having to shovel snow. I’ll give my dad credit; he never claimed it was to build character or teach me the value of hard work.

“Snowblowers are expensive,” he used to say. “You’re free.”

Once, I tried to appeal to my mom. “Don’t be such a wuss,” she suggested.

In other news, it’s seven sols till the harvest, and I still haven’t prepared. For starters, I need to make a hoe. Also, I need to make an outdoor shed for the potatoes. I can’t just pile them up outside. The next major storm would cause the Great Martian Potato Migration.

Anyway, all that will have to wait. I’ve got a full day today. After cleaning the solar cells, I have to check the whole solar array to make sure the storm didn’t hurt it. Then I’ll need to do the same for the rover.

I better get started.

• • •

AIRLOCK 1 SLOWLY depressurized to 0.006 atmospheres. Watney, wearing an EVA suit, stood inside it waiting for the cycle to complete. He had done it literally hundreds of times. Any apprehension he may have had on Sol 1 was long gone. Now it was merely a boring chore before exiting to the surface.

As the depressurization continued, the Hab’s atmosphere compressed the airlock, and AL102 stretched for the last time.

On Sol 119, the Hab breached.

The initial tear was less than one millimeter. The perpendicular carbon fibers should have prevented the rip from growing. But countless abuses had stretched the vertical fibers apart and weakened the horizontal ones beyond use.