SPIN

"One of the advantages of childhood. Or the First Age, as the Martians call it—is that correct?"

I nodded.

"They have four, I understand? Four Ages to our three?"

Yes, as Ina undoubtedly knew. Of all the folkways in Wun Ngo Wen's Five Republics, this was the one that had most fascinated the terrestrial public.

Human cultures generally recognize two or three stages of life—childhood and adulthood; or childhood, adolescence, adulthood. Some reserve special status for old age. But the Martian custom was unique and depended on their centuries-long mastery of biochemistry and genetics. The Martians counted human lives in four installments, marked by biochemically mediated events. Birth to puberty was childhood. Puberty to the end of physical growth and the begi

And beyond adulthood, the elective age: the Fourth.

Centuries ago, Martian biochemists had devised a means to prolong human life by sixty or seventy years on average. But the discovery wasn't an unmixed blessing. Mars was a radically constrained ecosystem, ruled by the scarcity of water and nitrogen. The cultivated land that had looked so familiar to Ibu Ina was a triumph of subtle, sophisticated bioengineering. Human reproduction had been regulated for centuries, pegged to sustainability estimates. Another seventy years tacked onto the average life span was a population crisis in the making.

Nor was the longevity treatment itself simple or pleasant. It was a deep cellular reconstruction. A cocktail of highly engineered viral and bacterial entities was injected into the body. Tailored viruses performed a sort of systemic update, patching or revising DNA sequences, restoring telomeres, resetting the genetic clock, while lab-grown bacterial phages flushed out toxic metals and plaques and repaired obvious physical damage.

The immune system resisted. The treatment was, at best, equivalent to a six-week course of some debilitating influenza—fevers, joint and muscle pain, weakness. Certain organs went into a kind of reproductive overdrive. Skin cells died and were replaced in fierce succession; nervous tissue regenerated spontaneously and rapidly.

The process was debilitating, painful, and there were potential negative side effects. Most subjects reported at least some long-term memory loss. Rare cases suffered temporary dementia and nonrecoverable amnesia. The brain, restored and rewired, became a subtly different organ. And its owner became a subtly different human being.

"They conquered death."

"Not quite."

"You would think," Ina said, "with all their wisdom, they could have made it a less unpleasant experience."

Certainly they could have relieved the superficial discomfort of the transition to Fourth. But they had chosen not to. Martian culture had incorporated the Fourth Age into its folkways, pain and all: pain was one of the limiting conditions, a tutelary discomfort. Not everyone chose to become a Fourth. Not only was the transition difficult, stiff social penalties had been written into their longevity laws. Any Martian citizen was entitled to undergo the treatment, free of charge and without prejudice. But Fourths were forbidden to reproduce; reproduction was a privilege reserved for adults. (For the last two hundred years the longevity cocktail had included drugs that produced irreversible sterilization in both sexes.) Fourths weren't allowed to vote in council elections—no one wanted a planet run by venerable ancients for their own benefit. But each of the Five Republics had a sort of judicial review body, the equivalent of a Supreme Court, elected solely by Fourths. Fourths were both more and less than adults, as adults are both more and less than children. More powerful, less playful; freer and less free.

But I could not decipher, to Ina or to myself, all the codes and totems into which the Martians had folded their medical technology. Anthropologists had spent years in the attempt, working from Wun Ngo Wen's archival records. Until such research had been ba

"And now we have the same technology," Ina said.

"Some of us do. I hope eventually all of us will."

"I wonder if we'll use it as wisely."

"We might. The Martians did, and the Martians are as human as we are."

"I know. It's possible, certainly. But what do you think, Tyler—will we?"

I looked at En. He was still asleep. Dreaming, perhaps, his eyes darting under closed lids like fish underwater. His nostrils flared as he breathed and the motion of the ambulance rocked him from side to side.

"Not on this planet," I said.

* * * * *

Ten miles down the road out of Bukik Tinggi, Nijon knocked hard at the partition between us and the driver's seat. That was our prearranged signal: roadblock ahead. The ambulance slowed. Ina stood up hastily, bracing herself. She strapped a neon-yellow oxygen mask over En's face—En, awake now, seemed to be reconsidering the merits of the adventure—and covered her own mouth with a paper mask. "Be quick," she whispered at me.

So I contorted myself into the equipment locker. The lid banged down on the shims that allowed a little air to flow inside, a quarter-inch between me and asphyxiation.

The ambulance stopped before I was ready and my head gonged hard against the narrow end of the locker.

"And be quiet now," Ina said—to me or to En, I wasn't sure which.

I waited in the dark.

Minutes passed. There was a distant rumble of talk, impossible to decipher even if I had understood the language. Two voices. Nijon and someone unfamiliar. A voice that was thin, querulous, harsh. A policeman's voice.

They conquered death, Ina had said.

No, I thought.

The locker was heating up fast. Sweat slicked my face, drenched my shirt, stung my eyes. I could hear myself breathing. I imagined the whole world could hear me breathing.

Nijon answered the policeman in deferential murmurs. The policeman barked back fresh questions.

"Be still now, just be still," Ina whispered urgently. En had been bouncing his feet against the thin mattress of the gurney, a nervous habit. Too much energy for a CVWS victim. I saw the tips of Ina's fingers splayed across the quarter-inch of light above my head, four knuckled shadows.

Now the rear doors of the ambulance rattled open and I smelled gasoline exhaust and rank noonday vegetation. If I craned my head—gently, gently—I could see a thin swath of exterior light and two shadows that might be Nijon and a policeman or maybe just trees and clouds.

The policeman demanded something from Ina. His voice was a guttural monotone, bored and threatening, and it made me angry. I thought about Ina and En, cowering or pretending to cower from this armed man and what he represented. Doing it for me. Ibu Ina said something stern but unprovocative in her native language. CVWS, something something something CVWS. She was exercising her medical authority, testing the policeman's susceptibility, weighing fear for fear.

The policeman's answer was curt, a demand to search the ambulance or see her papers. Ina said something more forceful or desperate. The word CVWS again.

I wanted to protect myself, but more than that, I wanted to protect Ina and En. I would surrender myself before I saw them hurt. Surrender or fight. Fight or flight. Give up, if necessary, all the years the Martian pharmaceuticals had pumped back into my body. Maybe that was the courage of the Fourth, the special courage Wun Ngo Wen had talked about.

They conquered death. But no: as a species, terrestrial, Martian, in all our years on both our planets, we had only engineered reprieves. Nothing was certain.

Footsteps, boots on metal. The policeman began climbing into the ambulance. I could tell he had come aboard by the way the vehicle sank on its shocks, rolling like a ship in a gentle swell. I braced myself against the lid of the locker. Ina stood up, screeching refusals.