Грег Иган - Teranesia

Ojany said, ‘But what if that increases selection pressure for a version that can cross into marine species?’

‘If Furtado is right—’ Mayumi began, at which point almost everyone in earshot groaned. ‘ If Furtado is right ,’ he persisted, ‘it would do a lot more than increase selection pressure. Any avoidable risk of extinction would only sharpen the contrast between favourable and unfavourable mutations: if every surviving counterfactual cousin would have moved into the sea, the strategy would become impossible to miss. It would be like herding the gene straight into a new ecosystem.’

Deborah glanced at her watch and predicted, ‘In less than twenty-four hours, we’ll be able to stop worrying about Furtado.’ Prabir looked at her enquiringly; she explained, ‘The Lausanne team have gone ahead and started the synthetic chromosome test themselves. The verdict will be out by about noon tomorrow, our time.’

Cole, who’d been hovering at the edge of the group, interjected urbanely, ‘All this fear of “contagion” would be put swiftly to rest if you took the trouble to consult my seminal text on ambivalence towards the natural world, M/ Other . My analysis of the relevant cultural indices across a time span of several centuries reveals that the predominant passion changes cyclically, from deep filial affection to pure xenophobia and back. Pastoralism, industrialism, romanticism, modernism, environmentalism, transhumanism, and deep ecology are all products of the same dynamic. The anxiety in the midst of which we stand at this very moment is a stark validation of my thesis, whereby the nurturing, enfolding presence of the mother is radically reinterpreted, psychically transmuted into a threatening, disempowering, even alien force. But this perception will not endure. In due course, the pendulum will swing back again.’

Prabir had been watching Carpenter while Cole spoke; there’d been an encouragingly troubled expression building on his face. Some of the biologists followed Prabir’s gaze, until everyone in the group was looking at the student, waiting for his response.

Carpenter began tentatively, ‘If this gene does spread, wouldn’t it be neat, though? All the animals would evolve: they’d grow hands, and opposable thumbs, and we could talk to them. And if it happened to us too, we’d become telepathic. That’s the next level, right? And why keep it out of the ocean? What’s wrong with you people? Don’t you want the reefs to dream? The super-dolphins won’t stop us surfing. They’ll be our friends!’

Prabir detected movement in the corner of his vision; he turned to see the medical officer and two junior soldiers approaching.

The medical officer addressed him. ‘Come with me, please.’

‘Why?’ Prabir looked around for support. ‘You’ve taken a blood sample, what more do you want?’

‘This is for your own protection,’ the man insisted blandly.

‘ What is for my own protection?’ Prabir caught sight of Grant, who was watching with an expression of alarm. But she gave him a reassuring glance, as if to say that she hadn’t abandoned him, that she’d be working to get him out of this.

The medical officer said, ‘You’re infected. You’re going into quarantine.’

Prabir had expected to be placed under guard in a tent at the edge of the camp, or perhaps imprisoned in a cage built from rough-hewn branches tied together with rattan — the kind of thing they always seemed to be able to construct at short notice in movies, whenever someone on a tropical island needed to be restrained. What the Lord’s Army did instead was trash the control console of Grant’s boat, dispose of all the pigeons, butterflies and blood samples in a bonfire on the beach, steal Grant’s rifle and tranquilliser gun, and lock Prabir in the cabin. They posted one sentry on deck and another on the beach.

Prabir sat in the captain’s chair in front of the ruined console, swinging the seat slowly back and forth. The ancient PCR machine might have malfunctioned. Or it might have amplified nothing but a fragment of plant DNA that had entered his bloodstream through a scratch from a barbed-wire shrub. A foreign cell in the process of being taken apart by his immune system wouldn’t even have been replicating, let alone creating germ cells through meiosis — the prerequisite for the São Paulo gene to be expressed. Whatever the powers of SPP in the right context, an inert copy of its gene was just another piece of junk to be scavenged, broken down and recycled.

The gene had found ways to cross between other species, though; he couldn’t pretend it was unthinkable that it had breached his body’s defences. He’d been cut, scratched, bitten, and glued by half a dozen kinds of Teranesian plants and animals, and handled dozens more with broken skin. The gene might not have created a transmission route specifically for humans, but having been exposed to so many different mechanisms tailored for other animals, he could have been infected with a viable copy by sheer bad luck.

What did it do when it succeeded? Headed for the place where germ cells were made, carrying an endonuclease to incorporate itself into the genome. What was the worst possible scenario, then? His sperm would all carry the São Paulo gene, their DNA would be rewritten by the protein. But if there was any risk of transmission through sex, he could always learn to use condoms — and if he ever wanted a genetic child, that could be done almost as easily with another cell type in place of sperm. If it was warranted, he could even have new testes grown for transplant from a single uninfected skin cell.

That was not the worst scenario. What had the fishermen done in their village ? And why had Aslan been so ready to accuse him of rape? Could a gene that was switched on only in the stem cells that manufactured sperm influence sexual behaviour? Testosterone was made by other cells nearby; perhaps SPP could rewrite the genes of spermatocytes in such a way that they emitted chemical signals to enhance the secretion of testosterone by their neighbours. If the level in the blood had been cranked up sufficiently, could that alone have transformed the fishermen into rapists? It wasn’t completely far-fetched; body-builders had once gone psychotic from injecting similar hormones. The progression would not be inevitable, though: there were drugs that blocked testosterone. And again, in the longer term a transplant could dispose of the affected cells entirely.

Still not the worst. Why had he tried to make love to Martha ? Because she’d saved his life, and he’d imagined she’d welcome it? Because he’d wanted to be comforted any way he could, after facing the kampung? Because a surge of testosterone and a lack of alternatives had been enough to overwhelm both his nature and his judgement?

He had no end of rationalisations, no end of excuses. But the worst scenario was that none of them had really been enough. If the gene could gauge the reproductive consequences of everything it did, it might ‘sense’ the fact that it was in a cul-de-sac, and find a way to change that. If Furtado was right, once the gene was active, whatever it was physically capable of doing to his brain or body that would lead to it counting more copies of itself would be done .

At dusk, they brought him a meal. The sentry ordered him to the far side of the cabin then left the plate inside the door. Prabir tried to think lustful thoughts as he ate, but the situation was not conducive. What was he hoping to do: assay his sexuality by introspection, hour by hour, like a diabetic monitoring blood sugar? What had happened with Grant proved nothing, except that strong emotions could breach a barrier that he’d come to think of as inviolable.