"Now we know why they name all their trees," said Libo bitterly. "They planted them as grave markers for the piggies they tortured to death."
"This is a very large forest," Pipo said calmly. "Please confine your hypotheses to what is at least remotely possible." They were calmed by his quiet, reasoned tone, his insistence that even now they behave as scientists.
"What should we do?" asked Novinha.
"We should get you back inside the perimeter immediately," said Pipo. "It's forbidden for you to come out here."
"But I meant--with the body--what should we do?"
"Nothing," said Pipo. "The pequeninos have done what pequeninos do, for whatever reason pequeninos do it." He helped Libo to his feet.
Libo had trouble standing for a moment; he leaned on both of them for his first few steps. "What did I say?" he whispered. "I don't even know what it is I said that killed him."
"It wasn't you," said Pipo. "It was me."
"What, do you think you own them?" demanded Novinha. "Do you think their world revolves around you? As you said, the piggies did it, for whatever reason they have. It's plain enough this isn't the first time--they were too deft at the vivisection for this to be the first time."
Pipo took it with black humor. "We're losing our wits, Libo. Novinha isn't supposed to know anything about xenology."
"You're right," said Libo. "Whatever may have triggered this, it's something they've done before. A custom." He was trying to sound calm.
"But that's even worse, isn't it?" said Novinha. "It's their custom to gut each other alive." She looked at the other trees of the forest that began at the top of the hill and wondered how many of them were rooted in blood.
Pipo sent his report on the ansible, and the computer didn't give him any trouble about the priority level. He left it up to the oversight committee to decide whether contact with the piggies should be stopped. The committee could not identify any fatal error. "It is impossible to conceal the relationship between our sexes, since someday a woman may be xenologer," said the report, "and we can find no point at which you did not act reasonably and prudently. Our tentative conclusion is that you were unwitting participants in some sort of power struggle, which was decided against Rooter, and that you should continue your contact with all reasonable prudence."
It was complete vindication, but it still wasn't easy to take. Libo had grown up knowing the piggies, or at least hearing about them from his father. He knew Rooter better than he knew any human being besides his family and Novinha. It took days for Libo to come back to the Zenador's Station, weeks before he would go back out into the forest. The piggies gave no sign that anything had changed; if anything, they were more open and friendly than before. No one ever spoke of Rooter, least of all Pipo and Libo. There were changes on the human side, however. Pipo and Libo never got more than a few steps away from each other when they were among them.
The pain and remorse of that day drew Libo and Novinha to rely on each other even more, as though darkness bound them closer than light. The piggies now seemed dangerous and uncertain, just as human company had always been, and between Pipo and Libo there now hung the question of who was at fault, no matter how often each tried to reassure the other. So the only good and reliable thing in Libo's life was Novinha, and in Novinha's life, Libo.
Even though Libo had a mother and siblings, and Pipo and Libo always went home to them, Novinha and Libo behaved as if the Zenador's Station were an island, with Pipo a loving but ever remote Prospero. Pipo wondered: Are the pequeninos like Ariel, leading the young lovers to happiness, or are they little Calibans, scarcely under control and chafing to do murder?
After a few months, Rooter's death faded into memory, and their laughter returned, though perhaps it was not as carefree as before. By the time they were seventeen, Libo and Novinha were so sure of each other that they routinely talked of what they would do together five, ten, twenty years later. Pipo never bothered to ask them about their marriage plans. After all, he thought, they studied biology from morning to night. Eventually it would occur to them to explore stable and socially acceptable reproductive strategies. In the meantime, it was enough that they puzzled endlessly over when and how the pequeninos mated, considering that the males had no discernable reproductive organ. Their speculations on how the pequeninos combined genetic material invariably ended in jokes so lewd that it took all of Pipo's self-control to pretend not to find them amusing.
So the Zenador's Station for those few short years was a place of true companionship for two brilliant young people who otherwise would have been condemned to cold solitude. It did not occur to any of them that the idyll would end abruptly, and forever, and under circumstances that would send a tremor throughout the Hundred Worlds.
It was all so simple, so commonplace. Novinha was analyzing the genetic structure of the fly-infested reeds along the river, and realized that the same subcellular body that had caused the Descolada was present in the cells of the reed. She brought several other cell structures into the air over the computer terminal and rotated them. They all contained the Descolada agent.
She called to Pipo, who was running through transcriptions of yesterday's visit to the pequeninos. The computer ran comparisons of every cell she had samples of. Regardless of cell function, regardless of the species it was taken from, every alien cell contained the Descolada body, and the computer declared them absolutely identical in chemical proportions.
Novinha expected Pipo to nod, tell her it looked interesting, maybe come up with a hypothesis. Instead he sat down and ran the same test over, asking her questions about how the computer co
mparison operated, and then what the Descolada body actually did.
"Mother and Father never figured out what triggered it, but the Descolada body releases this little protein--well, pseudo-protein, I suppose--and it attacks the genetic molecules, starting at one end and unzipping the two strands of the molecule right down the middle. That's why they called it the descolador--it unglues the DNA in humans, too."
"Show me what it does in alien cells."
Novinha put the simulation in motion.
"No, not just the genetic molecule--the whole environment of the cell."
"It's just in the nucleus," she said. She widened the field to include more variables. The computer took it more slowly, since it was considering millions of random arrangements of nuclear material every second. In the reed cell, as a genetic molecule came unglued, several large ambient proteins affixed themselves to the open strands. "In humans, the DNA tries to re-combine, but random proteins insert themselves so that cell after cell goes crazy. Sometimes they go into mitosis, like cancer, and sometimes they die. What's most important is that in humans the Descolada bodies themselves reproduce like crazy, passing from cell to cell. Of course, every alien creature already has them."
But Pipo wasn't interested in what she said. When the descolador had finished with the genetic molecules of the reed, he looked from one cell to another. "It's not just significant, it's the same," he said. "It's the same thing!"
Novinha didn't see at once what he had noticed. What was the same as what? Nor did she have time to ask. Pipo was already out of the chair, grabbing his coat, heading for the door. It was drizzling outside. Pipo paused only to call out to her, "Tell Libo not to bother coming, just show him that simulation and see if he can figure it out before I get back. He'll know--it's the answer to the big one. The answer to everything."
"Tell me!"