ACT I: THE NUMBERS DO NOT MATCH

The physical said I was thirty-two. The biometrics said fifty-two. I stared at the display on the medical bay wall and waited for the machine to correct itself, because machines do not make errors—that was what I had been taught at the Academy, that was what I repeated to patients who questioned their own readings, that was the first principle of medicine in a universe where the human body was supposed to be the most reliable instrument aboard a starship.

But the machine did not correct itself. It blinked once, twice, and then displayed the same numbers in calm green digits: Age Estimate 52. Telomere Length: 18% of baseline. Cellular Senescence Index: 0.73.

"Run it again," I said.

The technician—a young man named Park, nineteen by his birth certificates, though his eyes had the flat look of someone who had spent too long in cryo-sleep and not enough time looking at anything that moved—ran it again.

Same numbers.

I sat on the examination table and pulled off my shirt so I could look at myself in the reflective panel on the bulkhead. My stomach had developed a softness it had not had three months ago. My shoulders, which I had been able to hold square for the entire length of the voyage until now, felt rounded. Not from weight. From something I could not name.

"Dr. Vasquez?" Park said. He sounded uncomfortable. He was right to be uncomfortable.

"Log entry," I said, turning away from the panel. "Personal. Dr. Elena Vasquez, medical officer, Prometheus Class vessel. Standard physical at cycle 1847. Biometric discrepancy noted and confirmed. Requesting review of environmental factors in medical bay and deep lab sectors."

"Aye, Doctor."

I did not tell Park that I had noticed other things. The way my hair, which I had kept cropped short for practical reasons, was thinning at the temples. The way my hands trembled slightly when I held a scalpel—so slightly that no patient would have noticed, but I had been holding scalpels for twenty years and I knew the difference between steady and not.

ACT II: THE DEEP LAB

The Prometheus was twelve hundred meters long and housed one hundred and twenty crew members across five decks. We were three-quarters of the way to Alpha Centauri, which meant we had been traveling for approximately one hundred and forty-eight years, which meant that everyone aboard was either in cryo-sleep or rotating through the awake cycles, which meant that at any given moment, approximately twenty-four of us were conscious and aware that we were hurtling through a void that would take four point three seven years to cross at our current velocity.

I was one of those twenty-four. I was also, apparently, dying. Not quickly—aging is never quick, even when it is accelerated. But inexorably. Like water wearing down stone.

I went to see Dr. Webb.

Marcus Webb was the ship's chief biologist, sixty-seven years old by birth and perhaps sixty-six by appearance. He had been on the Prometheus since launch, one of the original crew chosen for their expertise and their willingness to sign a two-hundred-year contract. He lived on Deck Five, near the deep lab, in the module that faced the rear of the ship—the side that looked out into the darkness we had been traveling through for more than a century and a half.

He was in the lab when I arrived, bent over a microscope with the hunched posture of a man who had spent his entire career looking at things too small to see with his naked eyes.

"Dr. Vasquez," he said without looking up. "To what do I owe the—?"

"The biometrics say I'm fifty-two."

He went very still. The posture did not change, but the stillness did. It was the stillness of a man who had been interrupted in the middle of something he had chosen to do and was now forced to decide whether to continue or to stop.

"Show me," he said.

I showed him. The medical bay readout. The telomere measurements. The cellular senescence index.

He studied them in silence. Then he said: "How long?"

"How long since you first noticed?"

"How long until I reach terminal senescence?"

I thought about it. "At this rate? Approximately eleven years. Maybe twelve, if the acceleration slows."

He nodded. It was not a nod of sympathy. It was a nod of calculation.

"JUV-7," I said. It was not a question. I had been a medical officer for twelve years. I knew about the classified experiments. I had just not known they were happening inside my own body.

"JUV-7 was designed to repair telomere degradation caused by long-duration cryo-sleep," Webb said. His voice was calm. Measured. The voice of a man explaining a scientific fact to a colleague. "The theory was sound. The application was not."

"You knew."

"I suspected."

"You suspected and you kept running the experiment."

"I suspected and I kept running the experiment." He turned in his chair to face me fully. His eyes were old. Not old like my hands were old now—old in the way that belonged to someone who had been sixty-seven for twenty years and was now, I realized, perhaps approaching ninety. "Elena, do you understand what this ship is? Do you understand what two hundred years means to a human being?"

"I understand that you have been experimenting on the crew."

"I understand," he said softly, "that there are one hundred and twenty people on this ship and I am the only one who knows how to keep the hydroponics systems running. I am the only one who understands the genetic stability of the seed bank. I am the only one who—when the time comes—will be able to make the decisions about which crew members wake up and which ones stay in the ice."

"The seed bank doesn't need a sixty-seven-year-old body."

"It needs a sixty-seven-year-old mind." He looked at me and for the first time I saw something in his eyes that was not calculation. It was something like shame. "I did not plan for you. You were not in the risk matrix. You walk past the lab every day. You check on the systems. You stand in the doorway. I did not think—"

"You did not think it would happen to me."

"I did not think I would let it happen to you."

ACT III: THE OBSERVATION DECK

I did not report him.

That was the hardest thing I have ever done. Not because it was easy—reporting a fellow officer, even a disgraced one, is not difficult when you have the evidence. The hard part was not reporting him, because the evidence was right there in the biometric readouts and the lab logs and the telomere measurements. The hard part was sitting with the knowledge that the only person on an entire starship who knew the truth had chosen silence over transparency, and understanding why.

I went to the observation deck. It was on Deck One, the top of the ship, a cylindrical room with transparent aluminum walls that looked out into the void. We had been passing through the same patch of stars for one hundred and forty-eight years. I knew their positions by heart. I could have navigated by them blindfolded.

I sat in the chair that faced the darkness and I opened my medical log.

"Personal entry, Dr. Elena Vasquez. Cycle 1848. I have made a decision. I will not report Dr. Webb. Not because he is right. Not because his actions are justifiable. But because he is right about one thing: this ship needs him. And I am—was, thirty-two years old, was—strong. Strong enough to carry this."

I looked at my hands. They trembled slightly. Not enough to be visible to anyone who did not know me well enough to look. Which was fortunate, because there was no one aboard the Prometheus who knew me well enough to look.

"Cycle 1849. The aging continues. I estimate I am now biologically forty-seven. My hair has thinned considerably. My joints ache when the ship's artificial gravity shifts during rotation adjustments. I feel tired. Not the tiredness of a long shift in the medical bay—the tiredness of a woman who has been asked to walk two hundred years and has only enough strength for half of them."

"Cycle 1850. Dr. Webb asked me today if I was all right. I told him I was fine. He believed me. He did not ask why. He did not ask how. He is a brilliant biologist and a terrible human being, but he is not cruel. He simply cannot see past the mission. He cannot see past the data. He cannot see the person standing in front of him whose telomeres are dissolving like sugar in hot water."

"Cycle 1851. I found something interesting in the deep lab today. Webb's personal logs, hidden behind the gene sequencer. He has been recording his own biometrics for three years. He is seventy-one. His telomeres are maintained at artificial levels by JUV-7 injections. He looks forty. He is seventy-one. He has been lying to everyone on this ship, including himself, for three years."

"Cycle 1852. I will keep recording. Not for Webb. Not for the captain. For whoever wakes up when we reach Alpha Centauri. If no one is awake to record the final entries, perhaps the crew who emerge from cryo will find these logs and know that someone was here. Someone who aged in the dark while the ship carried them through the nothing between stars."

ACT IV: THE LAST ENTRY

"Cycle 1860. I am biologically sixty-one now. My hands shake so badly I can barely hold the pen. My eyes need reading lenses—I have not had any aboard this ship since the optical supplies were used up in cycle 1200. I can see the numbers on the display, but only when I hold the readout arm's length away."

"Webb does not know about this entry. I write it in secret, in the observation deck, when the rest of the awake crew are in their modules and the ship hums around me like a machine that does not know it is carrying dying passengers."

"I do not hate him. That is the strangest thing. I do not hate the man who stole my youth. I do not hate the man who looked at me with shame and could not bring himself to stop. I do not hate the man who calculated that my eleven years were worth his contribution to a mission that may or may not succeed when we arrive."

"I feel something worse than hatred. I feel sadness. For him. For myself. For the one hundred and twenty people who will wake up in Alpha Centauri and find a world that may or may not be habitable and a ship that has carried them through two centuries of nothing. And for me, who will not be there to see it."

"Cycle 1861. Final entry."

I wrote it slowly. Each word took effort. My hands were no longer my hands—they belonged to a woman who had lived six decades and three months, crammed into a body that had been given thirty-two and asked to carry twice that weight.

"I am Dr. Elena Vasquez, medical officer of the vessel Prometheus. I am sixty-one years old, biologically speaking. I was thirty-two when this began. I will not reach Alpha Centauri. I will not see the world we were sent to find. But I have recorded everything. The biometric data. The progression. The truth about JUV-7. The truth about Dr. Webb. The truth about what it costs to cross the space between stars."

"The stars look the same as they did when I was thirty-two. They will look the same when I am gone. They always have. They always will."

"This is my log. This is my signal among the remnants of a youth I will not get back. If anyone reads this—if anyone, two hundred years from now, opens this file and reads these words—know that I was here. Know that I carried the weight of two centuries through a void that does not care whether you are young or old or alive or dead."

"Know that I was here."

I closed the log. I sat in the observation chair for a long time, watching the same stars I had watched for fourteen months. The ship hummed. The engine vibrated through the floor beneath my feet. Somewhere behind me, the hydroponics systems grew green in the artificial light, feeding the one hundred and twenty people who slept in the ice.

I am sixty-one years old. I am thirty-two years old. I am both. I am neither.

The stars keep burning. The ship keeps flying. The void keeps being void.

And I am here.

OTMES v2.0 Objective Tensor Code ================================ Name: Signal Among the Remnants (V-02) Code: OTMES-v2-1262270-M7-270-9810-0000-38 E_total: 14.2 Dominant Mode: M7 (Cosmic Horror/Solitude) Dominant Angle: 270° (Existential Absurdism) Tensor Rank: 7 Irreversibility: 1.0 M Vector: [7.0, 0.2, 3.0, 7.5, 1.0, 3.0, 6.0, 9.0, 2.0, 2.0] N Vector: [0.30, 0.70] K Vector: [0.70, 0.30]