Euan sang these songs off the public channels, speaking only to Freya on their private channel. Some of the other explorers were behaving similarly, speaking only to people they knew well. On the ship, word of their various expeditions then spread by word of mouth. Those on the surface seemed to feel a new distance from those on the ship. It was all different than it had been before.

Jochi stayed in his car, sealed away from all the rest of the settlers, eating dried and frozen food. One night he suited up and went to one of the other expedition cars and took all the food and portable air tanks in it back to his car.

He had requested permission to return to the ship; every day’s communication from him to the ship began with the same request. So far the ship’s governing council had only refused his request once, and after that, left their refusal unspoken. No one was to be returned for now. The settlers were under quarantine.

So Jochi spent his time in his car, looking at his screen. He was able to operate some of the robotic medical devices under the hoods in the clinic lab where Clarisse had died, and he spent some of his time investigating the mud Euan and the rest had brought back in, making use of the clinic’s electron microscope. His training with Aram and the math team had been in mathematics, but as part of that team he had sometimes worked with the biophysicists, and in any case he was now investigating as much as he could, so Aram expressed the hope that he might find something helpful. Aram was sick with worry that Jochi was down there; he spent many hours in Badim and Freya’s kitchen, hunched over and wan, looking at the screens like everyone else.

For a long time Jochi said nothing about what he was finding. When Freya asked him about it, he only shrugged and looked out at her from her screen.

Once he said, “Nothing.”

Another time he said, “Mathematics is not biology. At least not usually. So, I don’t know what I’m doing.”

“Should I send you more of the medical archives from the solar system feed?” Freya asked.

“I’ve looked at the index. I don’t see anything that will help.”

A week later, more than half the people in Hvalsey had fevers. Jochi stayed in his car. He didn’t ask to return to the ship anymore.

Euan started going out into the estuary again, or the sea cliffs. He slept out there, and seldom came in to eat. Everyone in Hvalsey behaved a little differently, and it wasn’t clear they were talking to each other very much. One day a few of them arranged a dance, and they all wore something red to it.

Jochi called Aram one morning and said flatly, “I think I may have found the pathogen. It’s small. It looks a little like a prion, maybe. Like a strangely folded protein, maybe, but only in its shape. It’s much smaller than our proteins. And it reproduces faster than prions. In some ways it’s like the viris that live inside viruses, or the v’s, but smaller. Some seem to be nested in each other. The smallest is ten nanometers long, the largest fifty nanometers. I’m sending up the electron microscope images. Hard to say if they’re alive. Maybe some interim step toward life, with some of the functions of life, but not all. Anyway, in a good matrix they appear to reproduce. Which I guess means they’re a life-form. And we appear to be a good matrix.”

“Why us?” Aram asked. He had linked Badim into the call, given its significance. “We’re alien to the place, after all.”

“We’re made of organic molecules. Maybe it’s just that. Or we’re warm. Just a good growth medium, that’s all. And our blood circulation moves it around in us.”

“So they’re in that clay from the estuary?”

“Yes. That’s the highest concentration. But now that I’ve found them, I’ve seen a few almost everywhere. In the river water. In seawater. In the wind.”

“They must need more than water.”

“Yes. Sure. Maybe salts, maybe organics. But we’re salty, and organic. And so is the water down here. And the wind rips the salts right into the air.”

When three more of the people in Hvalsey died in the same way as Clarisse, of something like anaphylactic shock, and then Euan came down with a fever too, he went out by himself, around the estuary’s edge to the beach under the short cliffs, at the south end of the lagoon.

It was windy as always, the offshore wind of the midmorning of the daymonth. So once he got onto the beach and under the sea cliffs, he was mostly out of the wind. The katabatic gusts came barreling down the gap of the estuary and hit the incoming waves, holding up their faces for a time as they rose up in the shallows, also flinging long plumes of spray back from the crests. These arcs of spray were barred by fat little rainbows, called ehukai in the Hawaiian language. Planet E was a thick crescent in its usual spot in the sky, very bright in the dark blue, so that the light in the salt-hazed air over the sea seemed to come from all directions, and suffuse everything. The double shadows there on the ground were faint, and every rock and wave seemed stuffed with itself.

“This would have been a nice place to live,” Euan said.

He was talking only to Freya now, on their private channel. She was sitting on the chair by her bed, hunched over her stomach, looking at the screen. Euan was looking here and there, and her screen showed whatever he was looking at.

“A beautiful world, for sure. Too bad about the bugs. But I guess we should have known. That stuff about the oxygen in the atmosphere being abiologic—I guess you’ll have to rethink that one. I suppose it could still be true. But if these things Jochi found exhale oxygen, then probably not.”

Long silence. Then Freya heard him heave a breath, in and out.

“Probably they’re like archaea. Or a kind of pre-archaea. You’ll have to keep an eye out for that. There might be other chemical signals in oxygen that would reveal its origins. The ratio of isotopes might be different depending on how it got expressed into the air. I wouldn’t be surprised. I know they thought they had a rubric there, but they’ll have to recalibrate. Life might be more various than they thought. That keeps happening.

“Not that you’ll have much of a chance to test it here,” he went on after a while. He was walking on the beach now. The wind was scraping across his exterior mike, and rolling sand grains down the tilted beach into the foam surging up at his feet.

“I guess you’ll have to try to do something with F’s moon now. Presumably it’s dead. Or even try E.” He looked up at it, big in the blue sky. “Well, no. It’s too big. Too heavy.”

Two minutes later: “Maybe you can just keep living on the ship, and stock up on whatever you run out of, from here and from E. Terraform F’s moon if you can. Or maybe you can resupply and get to another system entirely. I seem to recall there’s a G star just a few more light-years out.”

Long silence.

Then:

“But you know, I bet they’re all like this one. I mean, they’re either going to be alive or dead, right? If they’ve got water and orbit in the habitable zone, they’ll be alive. Alive and poisonous. I don’t know. Maybe they could be alive and we live with them and the two systems pass each other by. But that doesn’t sound like life, does it? Living things eat. They have immune systems. So that’s going to be a problem, most of the time anyway. Invasive biology. Then on the dead worlds, those’ll be dry, and too cold, or too hot. So they’ll be useless unless they have water, and if they have water they’ll probably be alive. I know some probes have suggested otherwise, like here. But probes never stop and test thoroughly. They might just as well be running their tests from Earth, if you think about it. Bugs like these we’ve got here, you aren’t going to find those unless you slow down and hunt really hard. Live nearby for a while and look. At which point it’s too late, if you get a bad result. You’re out of luck then.”