"Ian," she whispered. "Look - there are two of them."
Over to the right, he saw a second animal step from behind the trees. It was larger, the female of the pair. The animals growled, a deep rumble in the night. They emerged slowly from the cover of the trees, stepping into the clearing. They blinked in the harsh light.
"Are those the parents?"
"I don't know. I think so."
He glanced over at the baby. It was still unconscious, breathing steadily, the blanket rising and falling regularly.
"What are they doing here?" she said.
"I don't know."
The animals were still standing at the edge of the clearing, near the cover of the trees. They seemed hesitant, waiting.
"Are they looking for the baby?" she said.
"Sarah, please."
"I'm serious."
"That's ridiculous."
"Why? They must have tracked it here."
The tyrannosaurs raised their heads, lifting their jaws. Then they turned their heads left and right, in slow arcs. They repeated the movement, then took a step forward, toward the trailer.
"Sarah," he said. "We're miles from the nest. There isn't any way for them to track it."
"How do you know?"
"Sarah - "
"You said yourself, we don't know anything about these animals. We don't know anything about their physiology, their biochemistry, their nervous systems, their behavior. And we don't know anything about their sensory equipment, either."
"Yes, but - "
"They're predators, Ian. Good sense of vision, good sense of hearing and smell."
"I assume so, yes."
"But we don't know what else," Sarah said.
"What else?" Malcolm said.
"Ian. There are other sensory modalities. Snakes sense infrared. Bats have echolocation. Birds and turtles have magnetosensors - they can detect the earth's magnetic field, which is how they migrate. Dinosaurs may have other sensory modalities that we can't imagine."
"Sarah, this is ridiculous."
"Is it? Then you tell me. What are they doing out there?"
Outside, near the trees, the tyrannosaurs had become silent. They were no longer growling, but they were still moving their heads back and forth in slow arcs, turning left and right.
Malcolm frowned. "It looks like...they're looking around...."
"Straight into bright lights? No, Ian. They're blinded."
As soon as she said it, he realized she was right. But the heads were turning back and forth in that regular way. "Then what are they doing? Smelling?"
"No. Heads are high. Nostrils aren't moving."
"Listening?"
She nodded. "Possibly."
"Listening to what?"
"Maybe to the baby."
He glanced over again. "Sarah. The baby is out cold."
"I know."
"It isn't making any noise."
"None that we can hear." She stared at the tyrannosaurs. "But they're doing something, Ian. That behavior we're seeing has meaning. We just don't know what it is."
From the high hide, Levine stared through his night-vision glasses at the clearing. He saw the two tyrannosaurs standing at the edge of the forest. They were moving their heads in an odd, synchronized way.
They took a few hesitant steps toward the trailer, lifted their heads, turned right and left, and then seemed finally to make up their minds. The animals moved quickly, almost aggressively, across the clearing.
Over the radio, they heard Malcolm say, "It's the lights! The lights are drawing them."
A moment later, the exterior lights were turned off, and the clearing went black. They all squinted in the darkness. They heard Malcolm say, "That did it."
Thorne said to Levine, "What do you see?"
"Nothing."
"What're they doing?"
"They're just standing there."
Through the night-vision goggles, he saw that the tyrannosaurs had paused, as if confused by this change in light. Even from a distance, he could hear their growls, but they were uneasy. They swung their great heads up and down, and snapped their jaws. But they did not move closer.
Kelly said, "What is it?"
"They're waiting," Levine said. "At least for the moment."
Levine had the distinct impression that the tyrannosaurs were unsettled. The trailer must represent a large and fearsome change in their environment. Perhaps they would turn away, he thought, and leave. Despite their enormous size, they were cautious, almost timid animals.
They growled again. And then he saw them move forward, toward the darkened trailer.
"Ian: what do we do?"
"Damned if I know," Malcolm whispered.
They were crouched down side by side in the passageway, trying to stay out of sight in the windows. The tyrannosaurs moved implacably forward. They could feel each step as a distinct vibration now - two ten ton animals, moving toward them.
"They're coming right at us!"
"I noticed," he said.
The first of the animals reached the trailer, coming so close that the body blocked the entire window. All Malcolm could see was powerfully muscled legs and underbelly. The head was far above them, out of view.
Then the second tyrannosaur came up on the opposite side. The two animals began to circle the trailer, growling and snorting. Heavy footsteps shook the floor beneath them. They smelled the pungent predator odor. One of the tyrannosaurs brushed against the side of the trailer and they heard a scraping sound, scaly flesh on metal.
Malcolm felt sudden panic. It was the smell that did it, the smell that he suddenly remembered, from before. He began to sweat. He glanced over at Sarah, and saw that she was intent, watching the movements of the animals. "This isn't hunting behavior," she whispered.