THE LAST GREEN HOUR

Amber-Back

By the second week, Halcyon had stopped being a campsite and started, grudgingly, to become a place.

The perimeter fence closed its last gap on day nine—chain-link and solar-charged wire, nothing that would have stopped a determined predator but enough, Hale insisted, to slow one down long enough for a rifle to matter. The first four permanent structures went up around the old survey drone's original landing mark: a medical hall, a ration store, a council house, and a schoolroom that Wren had petitioned for so persistently that the council had finally relented, mostly, Mara suspected, to make her stop attending their meetings and asking pointed questions about resource allocation.

Mara's clinic had a floor now instead of packed earth, walls that kept the worst of the insects out, and exactly one working autoclave, which she guarded with the ferocity of a woman guarding the last fertile field in a famine.

"You look like you're plotting something," said Dr. Imogen Achebe, the colony's sole remaining biologist, letting herself into the clinic with a specimen case under one arm and mud to the knee.

"I'm plotting how to make four weeks of antibiotics last eleven days past the point they're supposed to run out."

"Optimistic math."

"It's the only kind I've got time for." Mara nodded at the case. "What did you bring me?"

Imogen set it on the exam table and opened it with the careful, reverent slowness of someone who still could not quite believe her own job existed. Inside, pinned and labeled with a precision that bordered on obsessive, were a dozen insect specimens, none of which Mara recognized, all of which had, in the last week, bitten at least one colonist.

"I want you to look at this one." Imogen tapped a squat, iridescent thing the size of a thumbnail. "Three cases so far—Delgado, the Ambrose boy, and now one of the perimeter crew. All three bites in the last four days have gone from swelling to low fever within about eighteen hours. That's fast for an allergic reaction. Too fast, maybe, to just be an allergic reaction."

"You think it's carrying something."

"I think we're the first mammals of our particular size and blood chemistry this thing has ever had the opportunity to bite, and I think evolution doesn't care that we didn't bring a vaccine for whatever it's been quietly perfecting against therapod skin for the last forty million years." Imogen said it almost cheerfully, the way scientists said terrifying things when the alternative was screaming. "I'd like to run bloodwork on all three patients. Compare it against baseline."

"You'll have it by tonight." Mara looked at the specimen a moment longer. "Name it yet?"

"Council's calling it the amber-back. Catchy, I thought."

"Catchier than what they named the thing that got Ilanova, I hope."

Imogen's smile faded a degree. "They're calling that one the Dusk-runner. Hale's men have seen it twice more since. It hasn't come back inside the fence line, but it's been pacing it. Watching, is the word one of the sentries used. Which is not usually a word you want associated with an apex predator that's already demonstrated it's fast enough to close forty meters before anyone can get a shot off."

"Cheerful."

"I contain multitudes."

Wren's schoolroom held eleven children between the ages of five and thirteen, one exhausted teacher named Priya Okonkwo-Lindqvist who had been an actuarial analyst in her previous life and had volunteered for the position purely, she said, because somebody had to, and she was tired of doing spreadsheets for a species that no longer had an economy worth calculating, and a single shared resource that no other classroom in human history had ever possessed: an entire unexplored ecosystem outside the window, eighty-nine million years deep, offering itself up for observation one careful, fenced-in glimpse at a time.

Wren had appointed herself, without asking anyone's permission, the class's unofficial cataloger. Her sketchbook—the second one now, the first having filled up in eleven days—held forty-three separate entries, each with a careful, if occasionally inaccurate, scientific name she'd invented herself, since nobody in Halcyon yet had authority to assign real ones.

"That's not what a hadrosaur's skull looks like," said Micah Ambrose, age eleven, peering over her shoulder during free hour. He was the same boy who'd been treated for the amber-back bite three days prior, and still favored the arm slightly.

"I haven't seen a hadrosaur's skull. I've seen the outside of a hadrosaur's head. That's different."

"You put horns on it."

"I put a guess at horns on it, in pencil, so I can erase it if I'm wrong." Wren did not look up from the page. "That's called a hypothesis, Micah."

Micah, who did not have a ready answer to that, wisely retreated.

It was, Priya reflected, watching from her desk, one of the stranger gifts the crossing had handed the youngest of them—a world so entirely unmapped that a child's careful attention was not a hobby but an actual, useful contribution to the sum of human knowledge. She had watched Wren Voss go, in two weeks, from a silent, shell-shocked eight-year-old flinching at every unfamiliar sound outside the fence to something closer to what the old world would have called, with real reverence, a naturalist. Grief, in the girl, seemed to have curdled not into despair but into an almost frightening focus, as if cataloging the impossible new world in careful pencil lines was the only grammar she had left for processing the loss of the old one.

Priya did not say any of this to Mara, when the surgeon came to collect her daughter at the end of the day, hollow-eyed from twelve hours in the clinic. She only said, "She's remarkable, you know," and watched something in Mara's exhausted face loosen, just slightly, upon hearing it.