Schroeder stared at the strange creatures milling around the square. They had stubby trunks and upturned tusks, and their hides were covered with fur. The significance of what he was seeing finally dawned on him.

“Baby elephants!”

“No,” Karla said, amazingly calm in spite of her unbounded excitement. “They're dwarf mammoths.”

“That can't be. Mammoths are extinct.”

“I know, but look closely.” She pointed the flashlight at the animals. A few of them glanced at the light, showing shiny round eyes of an amber hue. “Elephants don't have fur like that.”

“This is impossible,” Schroeder said as if he were having a hard time convincing himself.

“Not entirely. Traces of dwarf mammoths were found on Wrangel Island as recently as 2000 B.C. That's only a blip in time. But you're right about this being unbelievable. The closest I've come to these creatures has been the fossilized bones of their ancestors.”

Schroeder said, “Why don't they run away?”

The mammoths seemed to have been sleeping when they were disturbed by the human intruders, but they weren't alarmed. They moved around the square in singles, twosomes or small groups, and showed little or no curiosity at the strangers.

“They don't think we'll hurt them,” Karla said. “They've probably never seen humans before. My guess is that they evolved from the full-grown animals that we saw in the murals. They've adjusted to the lack of sunlight and food through generations.”

Schroeder gazed at the herd of pigmy mammoths and said, “Karla, how do they live?”

“There's an air supply. Maybe it seeps down from the ceiling, or through crevasses we don't know about. Maybe they've learned to hibernate to preserve food.”

“Yes, yes, but what do they eat?”

She glanced around. “There must be a source somewhere. Maybe they get out into the open. Wait! Maybe that's what happened to the so-called baby that the expedition found. It was looking for food.”

“We must try to find out where they go,” Schroeder said. He made his way to the pyramid with Karla close behind. The mammoths moved aside to create a path. Some were slow to get out of the way and brushed against the humans, who had to wind their way through piles of manure. They reached the pyramid steps and began to climb. The effort put pressure on Schroeder's weak ankle, and he had to climb on his hands and knees, but he made it slowly to the flat top of the structure.

The elevation offered a total view of the square. The animals were still milling around with no rhyme nor reason to their movements.

Karla was counting the animals and figured there were about two hundred of them. Schroeder had been scanning the disorganized mob with other goals in mind, and, after a few minutes, he saw what he was looking for.

“Look,” he said. “The mammoths are forming into a loose queue over there near that corner of the plaza.”