Excavation

“As in nanotechnology?” Joan said. She had read a few theoretical articles that had discussed the possibility of building subcellular machines-nanobots-that could manipulate matter at the molecular or even atomic level. A recent article published in Scientific American described a crude first attempt to construct such microscopic robots by scientists at UCLA. In her mind, she remembered her own electron microscope scan of the metal: the tiny particulate matrix linked together by hooklike appendages. But nanobots? Impossible. The youth here had obviously been reading too much science fiction.

“Come see,” Anthony said, suddenly excited to be able to show off for his audience. He reached to the tray and lifted one of the pellets of metal with a pair of stainless-steel tweezers. He fed it into the machine before him. “Electron crystallography,” he explained. “It’s our own design here. It can isolate one unit of the metal’s crystalline structure and construct a three-dimensional picture. Just watch.” He tapped a monitor screen with the tweezers.

Joan leaned closer, fishing out her eyeglasses, forgetting for the moment her seduction of the young monk. When she had asked Anthony to show her the metal, she hadn’t meant such a close look. But now the scientist in Joan was intrigued.

An image appeared on the screen, in crisp detail, rotating slowly to show all surfaces. Joan recognized it. A single microscopic particle of the metal. It was octagonal in shape with six threadlike appendages: one on top, one on bottom, and four radiating out from midsection. At the end of each were four tiny clawed hooks, like sparrow’s talons.

Anthony pointed to the screen with the tip of a pen. “In overall shape and architecture, it bears a clear resemblance to a hypothesized nanobot proposed by Eric Drexler in his book Engines of Creation. He theorized a molecular machine in two sections: computer and constructor. The nanobot’s brain and brawn, so to speak.” He tapped at the central octagonal core. “Here’s the central processor, its programmed brain, surrounded by six nodes, or constructors, that manipulate the arms.” The young monk moved his pointer along to the thin talonlike hooks. “Here is what Drexler called its molecular positioners.”

Joan frowned. “And you think this thing can actually manipulate matter at the molecular level?”

“Why not?” Anthony said. “We have enzymes in our bodies right now that act as natural organic nanobots. Or take the mitochondria inside our cells…those organelles are no more than microscopic power stations, manipulating matter at the atomic level to produce ATP, or energy, for our cells. Even the thousands of viruses in nature are forms of molecular machines.” He glanced to her. “So you see, Mother Nature has already succeeded. Nanobots already exist.”

Joan slowly nodded, turning back to the screen. “This thing looks almost viral,” she mumbled. Joan had seen blowups of attacking viral phages. Under the electron microscope, they had appeared like lunar modules landing on cell membranes, more machine than living organism. This image reminded her of those viral assays.

“What was that?” Anthony asked.

Joan tightened her lips. “Just thinking out loud. But you’re right. Even the prions that cause mad cow disease could be considered nanobots. They all manipulate DNA at the molecular level.”

“Yes, exactly! Organic nanobots,” he said, his face flushed with excitement. He pointed back at the screen. “Some of us think this may be the first inorganic nanobot discovered.”

Joan frowned. Maybe it was possible. But to what end? she wondered. What is its purpose? She remembered Friar de Almagro’s warning etched on the crucifix. He had been frightened of some pestilence associated with the metal. If the monk was correct, was this a clue? Many of the natural “organic” nanobots she had mentioned to Anthony-viruses, prions-were disease vectors. She sensed that with more time she could unravel the mystery. Especially with the use of this facility, she thought, glancing around the huge laboratory.

But first, she had one experiment to perform. Before handling disease vectors, it was always best to have a way of sterilizing them. And the dead friar had hinted at a way in his cryptogram: Prometheus holds our salvation.

Prometheus, the bearer of fire.

Was that the answer? Fire had always been the great sterilizer. Joan remembered the assessment made by Dale Kirkpatrick, the metallurgist. He had noted that Substance Z used energy with perfect efficiency. But what if the metal received too much heat, like from a flame? Maybe as sensitive as it was, it couldn’t handle such an extreme.

Joan had come down here to test her theory, to steal a sample of metal on which to experiment. She risked a quick glance back at Friar Carlos. Her guard dog was clearly bored, too confident in the defenses of the Abbey to be worried about a mere woman.