[OC-FirstOfSeries] Something Is Wrong With The World And I'm The Only One Who Notices. | Chapter 1: Hydrogen Lines

*A companion story to* ***I'm the Last Person Who Remembers the Original Timeline. I Have Four Days.*** *— same universe, same event, different perspective. Stands alone but...*

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The coffee mug was orange.

I noticed it when I reached for it without looking, the way you reach for things that belong to you, and my hand found the handle and I looked down and it was orange. Burnt orange, with a small chip on the rim that my thumb fit into naturally, the way a thumb fits into a chip it has found a thousand times before.

I don't buy orange things. I never have. I find the colour aggressive in the mornings.

I set the mug down and looked at it for a moment. Then I filled it and drank from it and told myself that people change, that I had probably bought it on a whim and forgotten, that there was nothing wrong with an orange mug. People have orange mugs all the time.

This is how the morning started.

The apartment was mine. I knew this the way you know a space you've lived in long enough that your body navigates it in the dark without instruction. Third floorboard from the bathroom squeaks. The kitchen tap needs a quarter-turn past where it feels done or it drips all night. The window above the desk sticks in winter and I have learned to leave it cracked rather than fight it. My body knew all of this without thinking.

But there was a book on the shelf I did not recognize.

Not unfamiliar in the way a book becomes unfamiliar when you haven't thought about it in years. Unfamiliar in the way a face is unfamiliar when you are certain you have never seen it before. A thick paperback on the second shelf, spine outward: La Maison des feuilles by Mark Z. Danielewski, the French translation, and I knew without opening it that I had never read it and could not explain why it was there.

I pulled it out. Held it. Put it back.

I made a second cup of coffee in the orange mug and did not think about the book.

Elliot was already at his desk when I came out of the bedroom. He had been at his desk when I woke up, which meant he had been there since before I woke up, which was a fact I had stopped noting as unusual some time ago. He was reading something on his screen, and he had that expression he gets when he is reading, which is the expression of someone who is very much somewhere else while technically present.

"Morning," I said.

"Morning," he said, without looking up.

This is not a complaint. I want to be precise about that. It is an accurate description of a morning. Most of our mornings look like this, and I have made a certain peace with it, or something that functions like peace if you don't examine it too directly.

I drank my coffee. He read his screen. Outside, the street was doing what streets do in Montréal in November, which is looking grey and purposeful and slightly accusatory.

At some point he said: "I'll be home late. The paper."

I said: "Okay."

He left.

I stood in the kitchen for a moment after the door closed, holding the orange mug, and I had a feeling I could not name. Not loneliness exactly. Something more specific than loneliness. The feeling of standing in a room that is yours and finding it, for just a second, completely unrecognizable.

Then I put on my coat and went to work, because that is what you do.

My office at the Université de Montréal faces northeast, which means in winter I get about forty minutes of direct light in the early morning and then nothing for the rest of the day. I have arranged my desk to catch those forty minutes precisely. It is the most deliberate thing about my workspace, which otherwise tends toward organized entropy.

I am a spectroscopist. My specific area is the hydrogen 21-centimetre emission line, the radio frequency at which neutral hydrogen in interstellar space broadcasts its presence across the universe. It is one of the fundamental signals of cosmology. Stable, consistent, measurable to extraordinary precision. The kind of signal you can calibrate your entire instrument pipeline against because it does not change.

I had an overnight dataset waiting when I arrived. A routine sky survey, the kind I run continuously as background observation while working on other things. I put it up on the main screen and started the reduction pipeline, and while it was running I answered three emails and ate half a granola bar and thought about the book on the shelf.

The pipeline finished.

I looked at the reduced spectrum.

The 21-centimetre hydrogen line was shifted.

Not dramatically. Not in a way that would be obvious to someone glancing at the plot. But I am not someone glancing at the plot. I am someone who has been looking at hydrogen emission lines for eleven years, and I know where that line sits the way I know the third floorboard squeaks and the tap needs a quarter-turn past done.

It was shifted by a fractional amount in the direction that corresponded to a change in the fine-structure constant. The number that governs how electrons and photons interact, the number that sets the specific frequency at which hydrogen broadcasts its presence across the universe. If that number changes, the line moves. It is the most fundamental measurable constant in electromagnetic physics.

It does not change.

I ran the pipeline again with different parameters. Same result.

I pulled up my calibration data to check the instrument. The calibrator was fine.

I sat back in my chair and looked at the spectrum on the screen and went very still in the way I go still when something is wrong that I do not yet understand.

The shift was small. Precise. Consistent across every pointing in the dataset.

I pulled up my archive. Six months of overnight sky surveys, all automatically reduced and filed. I went back through them week by week, looking for the shift.

It wasn't there.

Not last week. Not last month. Not anywhere in six months of data.

I found the exact dataset where it appeared for the first time.

The timestamp read 03:14 AM. This morning. While I was asleep.

I looked at the timestamp for a long time.

Then I looked around my office, at the familiar organized entropy of it, and I thought about the orange mug. About the book I did not buy. About Elliot reading his screen while being somewhere else entirely. About the feeling of standing in a room that is yours and finding it, for just a second, completely unrecognizable.

The fine-structure constant had shifted at 03:14 AM.

Everything had felt wrong since I woke up at 06:30 AM.

I had been telling myself these were two separate things.

I looked at the spectrum again.

Non.

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