End of an Era

perhaps because I’d already started to suspect as much based on what I’d felt during my two brief mind contacts with Martians. “You’re made of microscopic units but in fact you are one big creature,” I said. I thought about the beach-ball-sized Het I’d seen ooze out of the half-headless triceratops. “You can lump together into large groupings, or form smaller concentrations. But you’re a colonial creature, like coral without the reefs, able to break apart into your tiny constituents—each smaller than a cell—to percolate through other living matter.” I’d never have submitted such wild speculation to a scientific journal, but I felt I was on the correct path. “I’m right, aren’t I?”

“Yess. Rightish, anyway.”

I decided to start with basics. “Life on Earth is based on self-replicating macromolecules called nucleic acids.”

“This we know.”

“Are you based on a nucleic acid?”

“Yess, we are nucleic acids.”

A funny way to phrase it. “Which one? DNA?”

“That is the one in the nuclei of your cells? The double helix? Yess, some of our individual components are DNA.”

“And the rest of your components?”

“Nondeoxy.”

I had to replay the beast’s response in my head a few times before it made sense to me. “Oh. RNA, you mean. Ribonucleic acid.”

The reptilian mouth hung open, showing dagger-like teeth, then the jaws drew together and, more simple hiss than English word, the thing said, “Yess.”

“Anything else?”

“Protein.”

I was silent for a time, digesting this. We are nucleic acids, it had said. I thought about that, and I thought about RNA. A nucleotide chain found in the cytoplasm of cells, it’s also associated with the storage of long-term memory and—of course!—with viruses. “You’re a virus,” I said.

“Virus?” It seemed to be trying the word on for size. “Yess, virus.”

It all made sense. Viruses are orders of magnitude smaller than cells, only one hundred to two thousand angstroms wide. A viral lifeform could easily slip through the cracks between cells, percolating through skin, muscle, and organs. But … but… “But viruses aren’t really alive,” I said.

The troodon looked at me, golden eyes catching the sunlight. “What mean you?”

“I mean, a virus isn’t complete until it enters a host.”

“Host?”

“A true lifeform. Viruses consist of stored instructions in DNA and RNA, and coats of protein, and that’s it. They can’t grow and don’t have any way to reproduce on their own; that’s why we say they’re not alive. They have to…”

The troodon blinked innocently. “Yess?”

I fell silent. Viruses have to take over, to seize, to invade the cellular machinery of an animal or plant. Then they force the cell to reproduce the virus’s own nucleic acids and make copies of its protein coat. I tried and tried to think of an example of a beneficial virus, but there are none. Viruses are, by definition, pathogenic, dangerous to cellular life, causing everything from influenza and poliomyelitis through measles and the common cold to the AIDS epidemic of the 1990s and early 2000s. Indeed, because of AIDS, virus research had become quite the hot topic in Western science, the way Star Wars weapons technology had been earlier. At least this time the money had been well spent: a cure for AIDS had been approved for human use in 2010. In fact, this new drug—Deliverance, as it was aptly called—was able to neutralize just about any virus, using a process called adaptive fractal bonding; it was now used to cure everything from colds and flus to Ebola infections.

But if the Hets were viral, then they had to … to conquer … other forms of life.

There were those who said humanity was inherently violent because of its carnivorous ancestors. How would the need to literally enslave cell-based life affect the psychology of the Hets? Would they be bent on conquest, driven to control living things? That could explain why they don’t like retaining the same animal bodies for any length of time. The drive to enslave could only be satiated by constantly taking over different creatures—

Hold on a minute, Brandy. Just hold on. Don’t go overboard.

But … viruses.

Come on, Brandy. You’re a scientist. Nothing wrong with a wild hypothesis, but you have to test it, prove it.

The Hets are a hive mind; they have no individuality. Maybe they don’t know anything about lying or deception.

So why not just ask the thing?

“You take over other lifeforms, don’t you?” I said. “So that you can use them.”

A double blink. “Of course.”

“And even if they’re intelligent life?”

And, again, a blink. “We are the only true intelligence.”

I shuddered. “I saw dinosaurs fighting mechanical tanks back there.”

The troodon tilted its head. “Oh.”

“Those were war games, weren’t they?”

“What is game?”

I shook my head. “ ‘Game’ is the wrong word, anyway. I mean they were practice sessions for a conflict.”

“Yess.”

“A conflict between your kind and some other intelligent life.”

“We are the only true intelligence,” the Het said again.

“All right, then: a conflict between your kind and those who made the mechanical tanks.”

“Yess.”

“Who started the conflict?”

“I don’t understand,” said the Het.

“What are you fighting over?”

“Over the ground.”

“No, I mean, what is the central issue in your conflict?”

“Oh, that.” The troodon scratched its lean belly. “They don’t want us to invade their bodies. They don’t want to be our slaves.”

“Shit.”

The Het looked at me through the troodon’s giant golden eyes. “I thought you required privacy for that activity,” it said.

Countdown: 3

And ye shall know the truth, and the truth shall make you free.

—John 8:32

When the Het and I arrived at the mud plain near the Sternberger, Klicks was nowhere to be seen. Judging by the position of the sun it was late afternoon, and I didn’t expect him to return before dinner. I could call him on the radio and tell him to hightail it back here, but there seemed no point in that. I couldn’t talk freely until after the Het left—and it gave no sign of wanting to do so. The troodon hopped from one foot to the other, its long tail held stiffly. After a moment, it tipped its drawn-out head up at the crater wall. Perched high above was our timeship.