42

Honolulu, Hawaii, 18 July 2021

The changeling had winced when it saw the headline space alien discovered in Samoa. It bought a paper and learned that it had murdered a “high-level American intelligence operative” by “injecting a mysterious substance.”

An editorial urged tolerance rather than fear. The alien would come forward if it knew it would not be harmed. The American government could be reasonable.

That was tempting. The electric chair would be a stimulating experience.

The story explained that scientists knew it was an alien because a tissue sample had no DNA. Was there any way to fake that?

The changeling had several degrees in biology, but didn’t know much about its own. It didn’t know what mechanisms were involved in changing from one creature—one thing—to another. It was as natural as breathing or photosynthesis were to organisms on Earth, and no more amenable to auto-analysis: if you were the only creature around that breathed, you could hardly dissect yourself and learn about lungs.

Of course the changeling could dissect itself, and did on a regular basis, but that didn’t teach it anything on the molecular level. Besides, the only science it knew was human science, and whatever it did when it changed into a shark or a roll of linoleum wasn’t covered by Organic Chemistry 101.

It did absorb DNA when it ate, naturally, and human DNA sometimes when it had sex with a male human. But whatever passed for metabolism in its body didn’t retain the stuff. It could absorb a school of albacore tuna and somehow change their substance into a Volkswagen.

Poseidon was probably going to be on the lookout for their alien returning, and would test job applicants for the presence of human DNA. What procedure could Sharon Valida expect?

A little research showed it that DNA testing for purposes of identification was usually done with buccal swabs, just wiping a few cells off the inside of the cheek, noninvasive and less personal than a blood or sperm sample. All it had to do was contrive to have a mouthful of human flesh before it sat down to apply for work.

Biting somebody, alive or dead, on the way to an interview didn’t seem practical. You could buy live portable DNA in the form of blood or sperm, but both posed practical problems, when it came to opening one’s mouth for the doctor or police officer.

Pure DNA was sold for research purposes, but only in microscopic quantities, hardly a mouthful. Besides, they might even decide to be invasive—want a job? We’ll have to take a little blood.

If it were only Russell involved, the changeling would just come out and tell him. Show up one night as Rae to get his attention, and explain. But there were all those tiresome people with guns—and Jack was ultimately in charge, not Russell. Jack felt dangerous, almost feral in his greedy intensity, and he could infer the changeling’s abilities from what had happened at Aggie Grey’s. There probably wouldn’t be a window facing the sea if Jack had anything to do with the conditions of their meeting.

On the other hand, the changeling knew enough about the Poseidon labs to know they couldn’t test for DNA in-house. The samples would go to Pago Pago, or even back here to Honolulu. That would buy some time, and also might afford an opportunity for substitution.

Perhaps the smartest thing would be to wait, to go join the circus again for a couple of decades; let things cool down. Jack and Russell would die, and new people would be in charge of the artifact.

But there were factors arguing against that, not the least of which being its feelings for Russ; it wanted him, above all others, to know what was really going on. Also, in twenty years—or five, or one—it was likely that the artifact would wind up in a vault in Washington, or Langley, impossible to approach.

There was something deeper, too, that the changeling couldn’t quite put a name to. Something in that pattern of ones and zeros was coming together—not logic, not numbers, but some sort of message.

Jan and Russ and the rest of Poseidon were analyzing the digits by looking for an analogue to the Drake message. But maybe the message was not for them. Maybe it was not for any human.

43

Apia, Samoa, 20 July 2021

They decided to set a trap for the alien.

“Rae wanted to get to the artifact, but was playing it cool. She asked me about getting around the security protocols so she could actually be in the same room with it; touch it.” Russell was doodling while he talked, drawing precise geometrical figures. He and Jack and Jan were outside Jack’s suite at Aggie Grey’s, talking quietly on the balcony. Jack had belatedly realized the spooks could have had his room bugged. It was less likely with the wrought-iron patio furniture, exposed to the elements.

“You told her you could arrange it?” Jan said.

“Put her off. I said security’d probably be relaxed soon, if the artifact stayed calm.”

“Leading her on,” Jack said.

“Maybe so. But I had no reason to think it was anything other than normal curiosity. Who wouldn’t want to go take a look at the thing?”

“Especially someone who’d come all this way to take a low-paying job, out of curiosity about it,” Jan said. “We tested her enthusiasm, remember, by having her pay her own way out for the interview.”

“Which we can do again, for the trap,” Jack said. “But maybe we should be more subtle.”

Russell nodded. “Whatever Rae is, she knows human nature well. She’s either going to be very careful or direct. She might just phone us and set up a meeting, one where she can control the conditions.”

“I wonder how old she is,” Jack said.

“Thirty-some.”

“Try thirty thousand. She can’t be killed—at least not by a point-blank shotgun blast, or by drowning—and she can masquerade as another person down to the fingerprints and retinas. Who was she before Rae Archer? Before that? She might go all the way back through human history and prehistory.

“She might have come to this planet even before humans evolved. Wandering around as a saber-toothed tiger. As a dinosaur before that.”

“No,” Jan said, “I don’t think she’s an alien at all. Just a different kind of human. They probably evolved alongside us and learned to keep their nature secret—or somewhat secret. There are legends about shape-changers and immortals.”

Jack rubbed his beard. “If so, there can’t be many of them. They’d just take over.”

“Maybe they have,” Russ said. “We ought to check every world leader for DNA.” He and Jan laughed nervously.

“The CIA is probably having this same conversation,” Jack said.

In fact, by the time Jack said this, every employee of the CIA had donated a few cheek cells to the agency, as had employees of NSA and Homeland Security. A “suggestion” had come down from the White House that all of the country’s leaders be tested.

Laboratories that did DNA testing were initially overwhelmed, but then their usual work was not just testing for the presence of DNA, but rather analyzing a sample to link it to a particular microorganism or person. This called for time-consuming processes like electrophoresis or mass spectrometry. But of course in those cases they already knew that a sample contained DNA; the question was pinning down its origin.

It turned out that a DNA/no DNA test was a lot simpler. You took the buccal swab and swirled it around in a test tube containing a solution that turns acid in the presence of even a microgram of DNA, then added a drop of phenol red. If it turned yellow, voila, the scraping was from a human cheek, or at least it came from something that had DNA of some description. It couldn’t discriminate between onion DNA and human, but in this case it didn’t matter. Samples of the “flesh” and “blood” in the arm that resided in a freezer in the Apia police station had been sent all over the world for analysis. The samples had the right proportions of carbon, hydrogen, oxygen, phosphorus, sulfur, and nitrogen to have come from the amino acids that make up human (or animal) protein, but their chemistry was not human. It was not even organic chemistry.