don’t know,’ Saul said. He folded his napkin beside his plate and thumped it with his hand. ‘And that’s all we’re going to tell you, Drew.’
Miller smiled broadly. ‘Jay Niles has been talking with me. He thinks punctuated equilibrium is on a roll, and he thinks it’s a systems problem, a network problem. Selective neural network intelligence at work. I’ve never much trusted talk about neural networks. Just a way of clouding the issue, of not describing what you need to describe.’ With complete lack of guile, Miller added, ‘I think I can help, if you want me to.’
‘Thanks, Drew. We might call on you,’ Kaye said, ‘but for right now, we’d like to have our own fun.’
Miller shrugged expressively, tipped his finger to his forehead, and walked back to the other end of the table, where he picked up another breadstick and began another conversation.
On the plane to La Guardia, Saul slumped in his seat. ‘Drew has no idea, no idea.’
Kaye looked up from the airplane copy of Threads.
‘About what?’ Kaye asked. ‘He seemed pretty on track to me.’
‘If you or I or anybody in biology was to talk about any kind of intelligence behind evolution …’
‘Oh,’ Kaye said. She gave a delicate shudder. ‘The old spooky Vitalism.’
‘When Drew talks about intelligence or mind, he doesn’t mean conscious thought, of course.’
‘No?’ Kaye said, deliciously tired, full of pasta. She folded the magazine into the pouch under the tray table and leaned her seat back. ‘What does he mean?’
‘You’ve already thought about ecological networks.’
‘Not my most original work,’ Kaye said. ‘And what does it let us predict?’
‘Maybe nothing,’ Saul said. ‘But it orders my thinking in useful ways. Nodes or neurons in a network leading to neural net patterns, feeding back to the nodes the results of any network activity, leading to increased efficiencies for every node and for the network in particular.’
‘That’s certainly clear enough,’ Kaye said, making a sour face.
Saul wagged his head from side to side, acknowledging her criticism. ‘You’re smarter than I’ll ever be, Kaye Lang,’ Saul said. She watched him closely, and saw only what she admired in Saul. The ideas had taken hold of him; he was not interested in attribution, merely in seeing a new truth. Her eyes misted, and she remembered with an almost painful intensity the emotions Saul had aroused in their first year together. Goading her, encouraging her, driving her nuts until she spoke clearly and understood the full arc of an idea, a hypothesis. ‘Make it clear, Kaye. That’s what you’re good at.’
‘Well …’ Kaye frowned. ‘That’s the way the human brain works, or a species, or an ecosystem, for that matter. And it’s also the most basic definition of thought. Neurons exchange lots of signals. The signals can add or subtract from each other, neutralize, cooperate to reach a decision. They follow the basic actions of all nature: cooperation and competition: symbiosis, parasitism, predation. Nerve cells are nodes in the brain, and genes are nodes in the genome, competing and cooperating to be reproduced in the next generation. Individuals are nodes in a species, and species are nodes in an ecosystem.’
Saul scratched his cheek and looked at her proudly.
Kaye waggled her finger in warning. ‘The Creationists will pop out of the woodwork and crow that we’re finally talking about God.’
‘We all have our burdens,’ Saul sighed.
‘Miller talked about SHEVA closing the feedback loop for individual organisms – that is, individual human beings. That would make SHEVA a neurotransmitter of sorts,’ Kaye said, mulling this over.
Saul pushed closer to her, his hands working to describe volumes of ideas. ‘Let’s get specific. Humans cooperate for advantage, forming a society. They communicate sexually, chemically, but also socially – through speech, writing, culture. Molecules and memes. We know that scent molecules, pheromones, affect behavior; females in groups come into oestrus together. Men avoid chairs where other men have sat; women are attracted to those same chairs. We’re just refining the kinds of signals that can be sent, what kind of messages, and what can carry the message. Now we suspect that our bodies exchange endogenous virus, just as bacteria do. Is it really all that startling?’
Kaye had not told Saul about her conversation with Judith. She did not want to take the edge off their fun just yet, especially with so little actually known, but it would have to happen soon. She sat up. ‘What if SHEVA has multiple purposes,’ she suggested. ‘Could it also have bad side-effects?’
‘Everything in nature can go wrong,’ Saul said.
‘What if it actually has gone wrong? What if it’s been expressed in error, has completely lost its original purpose and just makes us sick?’
‘Not impossible,’ Saul said in a way that suggested polite lack of interest. His mind was still on evolution. ‘I really think we should work this over in the next week and put together another paper. We have the material almost ready – we could cover all the speculative bases, bring in some of the folks in Cold Spring Harbor and Santa Barbara … Maybe even Miller. You just don’t turn down an offer from someone like Drew. We should talk to Jay Niles, too. Get a real firm base laid down. Shall we go ahead, put our money on the table, tackle evolution?’
In truth, this possibility scared Kaye. It seemed very dangerous, and she wanted to give Judith more time to learn what SHEVA could do. More to the point, it had nothing to do with their core business of finding new antibiotics.
‘I’m too tired to think,’ Kaye said. ‘Ask me tomorrow.’
Saul sighed happily. ‘So many puzzles, so little time.’
Kaye had not seen Saul so energetic and content in years. He tapped his fingers in rapid rhythm on the armrest and hummed softly to himself.
CHAPTER SIXTEEN Innsbruck, Austria
Sam, Mitch’s father, found him in the hospital lobby, his single bag packed and his leg wrapped in a cumbersome cast. The surgery had gone well, the pins had been removed two days before, his leg was healing on schedule. He was being discharged.
Sam helped Mitch out to the parking lot, carrying the bag for him. They pushed the seat all the way back on the passenger side of the rented Opel. Mitch fitted his leg in awkwardly, with some discomfort, and Sam drove him through the light mid-morning traffic. His father’s eyes darted to every corner, nervous.
‘This is nothing compared to Vienna,’ Mitch said.
‘Yes, well, I don’t know how they treat foreigners. Not as bad as they do in Mexico, I guess,’ Sam said. His father had wiry brown hair and a heavily freckled, broad Irish face that looked as if it might smile easily enough. But Sam seldom smiled, and there was a steely edge in his gray eyes that Mitch had never learned to fathom.
Mitch had rented a one-bedroom flat on the outskirts of Innsbruck, but had not been there since
