Jack drew her attention back to the computer. He leaned a hip on the desk. “So what’s so remarkable about this MRI scan?” he asked Zoë. “Why insist Lorna see this first?”
The neurobiologist pointed to the monitor. “It’ll help explain why we didn’t wait before performing the electroencephalograms.” Her voice took on an apologetic tone, but it didn’t appease Lorna.
She studied the rotating image. The brain looked like most birds’, and in fact it was not that much different from a mammalian brain. On the screen, the spinal cord bloomed into a medulla, a cerebellum, and a cerebrum that was divided into two hemispheres. She noted something strange almost immediately: five distinct darker objects appeared to be embedded between the hyperpallium and mesopallium layers of forebrain, the avian equivalent to the human neocortex. They were crisp and hard-edged, appearing almost crystalline in structure.
She rotated to get a top view of these odd densities. The five formed a perfect pentagram within the neurological tissue.
“What are they?” she asked.
Instead of answering, Zoë reached and tapped a button on the keyboard. The parrot’s brain vanished and was replaced by another. “This is the brain from one of the capuchin monkeys.”
Lorna pictured the conjoined twins as she leaned closer to the screen. The same strange densities were lodged within the brain tissue of the monkey. She revolved the image. The same number and lodged in the equivalent morphological locations. Even the pattern was the same. A perfectly symmetrical pentagram.
Despite the warmth of the room, a chill edged through her.
Zoë shifted closer. “We found these same odd intrusions in all the animals recovered from the trawler. I can show you the other scans.”
Lorna shook her head, trusting her colleagues’ assessment. “Are they implants?”
“We don’t think so.” Excitement welled in the neurobiologist’s voice. “We think they might be natural features.”
“Natural?”
“That’s right.” Zoë shifted the computer mouse to zoom down on one of the densities. “Look closer. See how there’s no scarring around the intrusions like you’d expect from a surgical implant. Also there’s no granulation tissue walled around it like you’d see from an embedded foreign body.”
“Then what are they?”
Zoë shrugged. “That’s what Dr. Metoyer wants to know. Jon Greer over in pathology is attempting to dissect one from the dead cub’s carcass so we can study it. He’s also taking multiple brain biopsies around the intrusion.”
“Biopsies?” Jack asked. “Why?”
Zoë circled a finger around the abnormalities on the computer screen. “The neurological tissue appears to be denser within the zone of the intrusions. Dr. Metoyer wanted to confirm a supposition that this region is made up of more densely packed neurons.”
Lorna wanted to know, too. She remembered the glow from the jaguar’s eyes, its cunningness. Even the parrot’s ability to recite the mathematical equivalent of pi. More neurons translated to a richer synaptic environment, which meant more computing power to be tapped. This discovery could explain why the animals seemed especially hyper-intelligent.
Zoë straightened and ran a hand through her short black hair. “Now you know why we wanted to perform those EEGs. We were so excited. We couldn’t wait.”
Lorna slowly nodded. By studying the electrical patterns of the brain, they were looking for any change in functionality associated with these intrusions. “What did you find with the EEGs?”
“At first nothing. Each animal’s brain-wave patterns seemed normal enough, each as unique as a fingerprint. There seemed to be no common ground.”
Rather than disappointment, Zoë’s face shone with amazement. Lorna knew there was another shoe still to drop. Zoë glanced over to Igor’s cage.
Lorna followed her gaze, then back to the neurobiologist. “What?”
“I’ll show you.” Zoë sidled next to her and tapped rapidly at the keyboard. “I’m going to display the set of four EEGs we took from the parrot, the two monkeys, and Bagheera, the cub. For simplicity’s sake, I’m only going to show a single lead from each animal.”
The readings appeared on the screen.
Zoë glanced over to Lorna with one eyebrow cocked. She read her colleague’s question. Can you see anything weird here?
It took Lorna only a second. She pointed to the two center tracings. “These two runs are nearly identical.” She read the labels and scrunched her brow. Cebus apella. Specimens A and B. “Those readings came from the conjoined twin monkeys.”
Zoë nodded. “That’s right. At first we thought it might be a mistake. Perhaps the electrode net placed on one monkey was picking up the electrical pattern from its twin. Or maybe because they were genetic twins, their brain activity also matched. Just to be sure we brought all the animals up here and retested them.”
She tapped at the keyboard and another four leads were displayed. “This is what we got when all four specimens were in the room at the same time.”
Lorna leaned closer, running each lead with the tip of a finger. Amazement grew. Impossible.
Jack spoke next to her. “They all look roughly the same.”
“We ran the leads for a full ten minutes each. They continued to stay synchronized.”
Lorna struggled to comprehend what she was seeing.
“Afterward,” Zoë said, “we took the other animals back to their ward. Except for the parrot here. We tested Igor again with the others gone. His EEG returned to its original unique pattern.”
Lorna stared over to the parrot and her brother. “Are you saying that when they’re all together, their brain-wave patterns somehow slip into perfect synchronization?”
“That’s what seems to be happening.”
How could that be? She had heard of women in dorms who would begin to menstruate in unison when housed together-but that was due to pheromones in the air, triggering a synchronized cycling. What could be causing the neurological equivalent in these animals? If this data were correct, there had to be some sort of stimulus or communication among the animals.
Lorna pulled up the MRI data on the monitor. Again the three-dimensional model of Igor’s brain appeared. She rotated it to look down upon the five strange densities.
“Whatever’s going on has to be tied to these intrusions,” Lorna said. “All the specimens share this common structure.”