Teranesia

They brought the boat closer to shore, then waded on to the beach. Grant was carrying a rifle now, as well as the tranquilliser gun. They went through the rituals of the insect repellent and the mine detector tests. As Prabir sat pulling his boots on, looking back at the reef, he pictured a water man rising from the waves, angry and ravenous, teeth shining like glassy steel. Then he punctured the illusion, scattering the figure into random spray. That was the trouble with the demons dreamed up by children and religions: you made the rules, and they obeyed them. It wasn’t much of a rehearsal for life. Once you started believing that any real danger in the world worked that way, you were lost.

They penetrated the jungle slowly; the thorned shrubs were even denser and more tangled than the species they’d seen before, with long, narrow involuted branches like coils of barbed wire. Prabir cut off a sample, tearing his thumb on a barely visible down of tiny hooks that coated the vines between the large thorns. He sucked the ragged wound. ‘Nice as it would be to solve the mystery, I’m beginning to hope we don’t stumble across a herbivore that needs this much discouragement.’

‘It’d probably be no worse than a rhinoceros or a hippo,’ Grant suggested. ‘But apparently it has no descendants here, to give birth to something similar.’

Prabir fished in his backpack for a band aid. ‘OK, I can accept that: seeds get blown about, continents drift, animal lineages die out locally. But why is it always the most extreme trait that gets resurrected? Why couldn’t these shrubs just grow something mildly inappropriate, like flowers optimised for a long-vanished pollinating insect?’

Grant mused, ‘There’s no evidence of the São Paulo protein ever having been used for mutation repair. So maybe that was never the case; maybe I’ve been clinging to that idea too stubbornly. It could be that the protein’s role has always been to reactivate old traits, to bring old inventions back into the gene pool from a dormant state.’

Prabir considered this. ‘A bit like a natural version of those conservation programmes where they cross endangered animals with frozen sperm from twenty years ago, to reinvigorate the species when the population becomes too inbred?’

‘Yeah. And sometimes they use a closely related species, not the thing itself. If this protein manages a kind of “frozen gene bank”, it would be even less purist about it: it wouldn’t have any qualms about creating a hybrid with a distant ancestor.’

To Prabir this sounded both simpler and far more radical than the mutation repair hypothesis: shifting the mechanism from an esoteric emergency response to a major factor in genetic change. Most of the same problems remained, though.

He said, ‘That still doesn’t explain how particular traits get frozen and thawed. Are you saying that this plant’s ancestors knew that they’d evolved a spectacularly effective set of defences, and deliberately tucked away a copy of the genes for the next aeon when they’d come in handy?’

Grant smiled, refusing to be provoked. ‘More likely it’s just a matter of the genes that persist the longest having the greatest chance of being duplicated at some point, which then increases their chance of surviving in an inactive form.’

‘And the mimicry? The symbiosis? How does something like that get synchronised?’

‘That, I don’t know.’

They pressed on. Prabir kept waiting for a flash of recognition, for the sight of an old gnarled tree or an outcrop of rock to awaken memories more strongly than the beach. He’d explored this side of the island completely; every step he was taking here was one he must have taken before. But too much had changed. Though the trees themselves appeared unaltered, there were no ferns, there were no small flowers on the ground, just the carnivorous orchids they’d seen on the other islands, and the ubiquitous barbed-wire shrubs. Even the scent of the forest was alien to him. It was like returning to a city to find it repaved and repainted, emptied of its old inhabitants and repopulated by strangers with new customs and new cooking smells. Ambon with its nouveau-colonial refurbishment had seemed more familiar than this.

The black cockatoos were here, too. Prabir stood and watched one for half an hour, waiting for Grant to finish dissecting an orchid.

The bird was sitting in a kanari tree. Using its teeth, it chewed straight through a slender branch that sprouted twigs bearing half a dozen white blossoms swollen with fruit. The cluster of twigs and fruit fell at the bird’s feet, landing on the large, solid branch where it was perched. It proceeded to attack one of the fruits, chewing through the leathery hull, which had not quite ripened to the point where it would split open and spill the seeds, the almonds, on to the ground.