BOUNDARY(105)

The suit's main advantages came from its incorporation of a carbon nanotube–derived fiber weave manufactured (at currently ruinous cost and mostly for military applications) by the Tayler Corporation. The "carbonan" reinforcement layers made the suits virtually impenetrable by any accident short of being struck by a meteor or shot by a heavy-duty firearm. The integrated electronics, "smart" sensors, recycling systems, and other bells and whistles had even forced A.J. to grudgingly admit that he couldn't have programmed their suits to be as effective; the integrated processor power simply wouldn't have been there.



Similar top-end designs were being tested by the military as powered battlefield armor. Due to a strong preference for saving power in space for other functions, however, there were no provisions for boosting the user's strength in the Tayler spacesuits. But there were ports to connect the suit to various other devices to control and even power them, as well as distributed sensors to track conditions around the wearer.



The suits were as well shielded as such mobile objects could reasonably be. The helmets were light and felt open, rather than cramped and claustrophobic as prior models had been. In addition, the suits incorporated an integrated exterior weave of electroactive pigments which varied the reflectivity of the exterior to assist in heating and cooling. Another layer of piezoelectrically-active fibers was able to stiffen the suit against detected impacts, distributing the force across the entire body of the wearer instead of permitting blunt trauma to be done to one area.



With the toughness of the suits a given, Joe and the rest of Nike's crew were better able to concentrate on their jobs. It might not be quite as easy as working on something back home, given microgravity and other factors. Still, it was orders of magnitude easier than it would have been a couple of decades earlier.



Locked back in, Harry nodded to Joe and the two began working on getting the door to open wider.



"Hey, did anybody figure out why these doors got locked up?" Harry asked to the invisible audience at large. "I mean, it can't just have been the power loss—only idiots would design doors that couldn't be opened in case of power failure, at least for most of their base. And we've found things that look like manual opening mechanisms."



"Well," A.J. answered, "it's impossible to be sure until we find out exactly what caused the disaster. But based on models Dr. Sakai and some of the other people in the astrogeological specialties have done . . . you remember the lines on the side of Phobos?"



"Yeah," Joe said, adjusting the grip of the lever arms. "Fracture zones, right?"



"Yep. No one was sure how far down those things went, or how intact—or not intact—Phobos was. The moonlet might have been just a ball of stone fragments that hadn't quite broken up. As it turns out the fracture zones aren't nearly that bad, but they are significant. If what happened to them involved a big explosion, or an impact, it might have shifted the geometry of the caverns slightly, changing angles just enough to cause the doors to lock up in their tracks."



"Makes sense," Joe said. "And with the seals shrinking through outgassing over the years, that would have given them enough space to move again. Okay, we're ready. Harry, let's open this thing up wide."



The door protested stubbornly, occasionally allowing the two to hear its dissatisfaction by transmitting a vibration through the equipment that sounded like a groan inside the suits. But, in a few minutes, the door was open wide enough for them to enter.



"Captain, we're going in now. And I think it's something new."



"Be careful."



"We will be. But, look, this place is dead. There's nothing dangerous here, aside from vacuum."



"That's what we think. Let's not assume."



"Right."



Joe drifted into the room cautiously after shining his own light around. The room was about average-sized, from what they'd seen so far. It was a bit over two meters at maximum height, which was too low for human comfort but still easy to move through. Fifteen meters long and about ten to twelve meters wide, the room's interior was clad in the metal-composite material they'd come to expect, with varicolored circles and lines on the walls that seemed to be a common theme.



Despite the similarities, though, it wasn't like anything they'd seen thus far. First, this room's long axis lay parallel to the corridor. They'd entered at one end, from the side. At the other end of the room was another door. That seemed to indicate a room bordering that side of the corridor but which had no direct entrance or exit in that wall, as they knew there weren't any other doors for quite some distance.