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“Is that your husband?” I asked, feeling like an ass for even having to pose the question.

She managed a small, almost imperceptible nod.

It was now well into the evening. I could come back tomorrow to ask Ethan McCharles’s colleagues the questions I needed answered for my report, but, well, Marilyn was right here, and, even though her field was literature rather than physics, she must have some sense of what her husband had been working on. I repositioned the sheet over his dead face and stood up. “Can you tell me what Ethan’s specialty was ?”

Marilyn was clearly struggling to keep her composure. Her lower lip was trembling, and I could see by the rising and falling of her blouse—so sharply contrasting with the absolutely still sheet—that she was breathing rapidly. “His—he … Oh, my poor, poor Ethan …”

“Professor Maslankowski,” I said gently. “Your husband’s specialty …?”

She nodded, acknowledging that she’d heard me, but still unable to focus on answering the question. I let her take her time, and, at last, as if they were curse words, she spat out, “Loop quantum gravity.”

“Which is?”

“Which is a model of how subatomic particles are composed.” She shook her head. “Ethan spent his whole career trying to prove LQG was correct, and …”

“And?” I said gently.

“And yesterday they revealed the true nature of the fundamental structure of matter.”

“And this—what was it?—this ‘loop quantum gravity’ wasn’t right?”

Marilyn let out a heavy sigh. “Not even close. Not even in the ballpark.” She looked down at the covered form of her dead husband, then turned her gaze back to me. “Do you know what it’s like, being an academic?”

I actually did have some notion, but that wasn’t what she wanted to hear. I shook my head and let her talk.

Marilyn spread her arms. “You stake out your turf early on, and you spend your whole life defending it, trying to prove that your theory, or someone else’s theory you’re championing, is right. You take on all comers—in journals, at symposia, in the classroom—and if you’re lucky, in the end you’re vindicated. But if you’re unlucky …”

Her voice choked off, and tears welled in her eyes again as she looked down at the cold corpse lying on the floor.

* * *

[Untranslatable proper name] Award: Award given every [roughly 18 Earth years] for the finest musical compositions produced within the Allied Worlds. Although most species begin making music even prior to developing written language, [The same untranslatable proper name] argued that no truly sophisticated composition had ever been produced by a being with a lifespan of less than [roughly 1,100 Earth years], and since such lifespans only become possible with technological maturity, nothing predating a race’s overcoming of natural death is of any artistic consequence. Certainly, the winning compositions bear out her position: the work of composers who lived for [roughly 140 Earth years] or less seem little more than atonal noise when compared to …

* * *

It had begun just two years ago. Michael—that’s my son; he was thirteen then—and I got a call from a neighbor telling us we just had to put on the TV. We did so, and we sat side by side on the couch, watching the news conference taking place in Pasadena, and then the speeches by the U.S. President and the Canadian Prime Minister.

When it was over, I looked at Michael, and he looked at me. He was a good kid, and I loved him very much—and I wanted him to understand how special this all was. “Take note of where you are, Michael,” I said. “Take note of what you’re wearing, what I’m wearing, what the weather’s like outside. For the rest of your life, people will ask you what you were doing when you heard.”

He nodded, and I went on. “This is the kind of event that comes along only once in a great while. Each year, the anniversary of it will be marked; it’ll be in all the history books. It might even become a holiday. This is a date like …”

I looked round the living room, helplessly, trying to think of a date that this one was similar to. But I couldn’t, at least not from my lifetime, although my dad had talked about July 20, 1969, in much the same way.

“Well,” I said at last, “remember when you came home that day when you were little, saying Johnny Stevens had mentioned something called 9/11 to you, and you wanted to know what it was, and I told you, and you cried. This is like that, in that it’s significant … but … but 9/11 was such a bad memory, such an awful thing. And what’s happened today—it’s … it’s joyous, that’s what it is. Today, humanity has crossed a threshold. Everybody will be talking about nothing but this in the days and weeks ahead, because, as of right now”—my voice had actually cracked as I said the words—“we are not alone.”

* * *

Cosmic Microwave Background Radiation: a highly isotropic radiation with an almost perfect blackbody spectrum permeating the entire universe, at a temperature of approximately [2.7 degrees Kelvin], Although some primitive cultures mistakenly cite this radiation as proof of a commonly found creation mythspecifically, a notion that the universe began as a singularity that burst forth violently—sophisticated races understand that the cosmic microwave background is actually the result of …

* * *

It didn’t help that the same thing was happening elsewhere. It didn’t help one damned bit. I’d been called in to U of T seven times over the past two years, and each time someone had killed himself. It wasn’t always a prof; time before McCharles, it had been a Ph.D. candidate who’d been just about to defend his thesis on some abstruse aspect of evolutionary theory. Oh, evolution happens, all right—but it turns out the mechanisms are way more complex than the ones the Darwinians have been defending for a century and a half. I tried not to get cynical about all this, but I wondered if, as he slit his wrists before reproducing, that student had thought about the irony of what he was doing.

The source of all his troubles—of so many people’s troubles—was a planet orbiting a star called 54 Piscium, some thirty-six light-years away. For two years now, it had been constantly signaling Earth with flashes of intense laser light.

Well, not quite constantly: it signaled for eighteen hours then paused for twenty, and it fell silent once every hundred and twelve days for a period just shy of two weeks. From this, astronomers had worked out what they thought were the lengths of the day and the year of the planet that was signaling us, and the diameter of that planet’s sun. But they weren’t sure; nobody was sure of anything anymore.

At first, all we knew was that the signals were artificial. The early patterns of flashes were various mathematical chains: successively larger primes, then Fibonacci sequences in base eight, then a series that no one has quite worked out the significance of but that was sent repeatedly.

But then real information started flowing in, in amazing detail. Our telecommunications engineers were astonished that they’d missed a technique as simple as fractal nesting for packing huge amounts of information into a very narrow bandwidth. But that realization was just the first of countless blows to our egos.

There was a clip they kept showing on TV for ages after we’d figured out what we were receiving: an astronomer from the last century with a supercilious manner going on about how contact with aliens might plug us into the Encyclopedia Galactica, a repository of the knowledge of beings millions of years ahead of us in science and technology, in philosophy and mathematics. What wonders it would hold! What secrets it would reveal! What mysteries it would solve!