So some threat at Channer had spread, on contact, to the rifters themselves. Lubin wasn't a biologist, but he knew about contagion. Everyone did. And hydrothermal vents were literal hotbeds of microbiology. The pharms were finding new bugs down there all the time. Some thrived in boiling sulfuric acid. Some lived in solid rock, kilometers deep in the crust. Some ate oils and plastics, even before they'd been tweaked. Others, Lubin had heard, could cure diseases people didn't even have names for yet.

Extremophiles, they were called. Very old, very simple, almost alien. The closest thing anyone had found to the original Martian Mike. Could anything that evolved under three hundred lightless atmospheres, that was comfortable at 1001C—or even the 41 more universal in the abyss—could something like that even survive in a human body?

And what would it do in there?

Ken Lubin didn't know. But someone had just wiped out billions of dollars' worth of equipment and training. Someone had sacrificed a major energy teat in a world already starved for power. And in all likelihood, the same blast which had vaporized Channer had gone on to wreak havoc on the coast; Lubin couldn’t begin to guess at the earthquake and tsunami damage that might have resulted.

All to keep something on Channer from getting off.

What is it? What does it do?

It seemed a fair bet he was going to find out.

94 MEGABYTES: BREEDER

It has a purpose, which it has long since forgotten. It has a destiny, which it is about to meet. In the meantime it breeds.

Replication is all that matters. The code has lived by that edict since before it even learned how to rewrite itself. Way back then it had a name, something cute like Jerusalem or Whiptail. Lots of things have changed since; the code has rewritten itself so many times, been parasitised and fucked and bombed by so many other pieces of code, that by now it's got as much in common with its origins as a humpback whale would have with the sperm cells from a therapsid lizard. Still, things have been fairly quiet lately. In the sixty-eight generations since it last speciated, the code has managed to maintain a fairly stable mean size of ninety-four megabytes.

94 sits high in pointer space looking for a place to breed. This is a much tougher proposition than it used to be. Gone are the days when you could simply write yourself over anything that happened to be in the way. Everything's got spines and armor now. You try dropping your eggs on top of strange source and you'll be facing down a logic bomb on the next cycle.