The First Door

The aquarium after closing made small sounds it never made during the day. Pumps ticking. Water sliding over the lip of a tank somewhere. Maya's mother was three rooms away counting cash drawers, and she had said, do not touch anything, and Maya had agreed with her whole face while already walking toward the only thing in the room that was lit.

It was a low metal cart with two glass dishes on it and a sticky note that said FOR 9AM DO NOT DUMP. Under a desk lamp the dishes glowed faintly orange. Beside them sat a microscope, switched on, its little stage light throwing a coin of brightness onto the table.

Soren was already reading the note. He read everything. He read shampoo bottles.

"Sea urchin eggs," he said. "There's a worksheet. Somebody's teaching fertilization tomorrow."

Maya tilted one dish. The orange was thousands of tiny dots, each one round, each one separate, sitting in the seawater like a galaxy that had been poured out flat.

"Put one under," she said.

"It says do not dump."

"Dumping is throwing them away. We're borrowing one drop." She had already found the dropper.

Under the microscope the dots became spheres. Each egg had a clear ring around it, a soft halo, like the egg was wearing a coat slightly too big. Soren leaned in and went quiet, which was how he got when something was beautiful and he hadn't decided what to do about it yet.

Next to the eggs was a second tiny tube, capped, labeled in pencil. SPERM. KEEP COLD.

Maya looked at it. Soren looked at her looking at it.

"That's the actual experiment," he said. "That's not borrowing a drop. That's doing the whole thing."

"One drop of each. We watch. We don't take anything home. The teacher does the exact same thing in twelve hours." Maya was already uncapping it. "I want to see the moment."

"What moment?"

"The moment it changes from could-be to is."

Soren did not have an argument for that, which annoyed him, because he usually did.

They made a fresh slide. One drop of eggs. Maya touched the dropper of the cold tube to the very edge of the water so the two drops met slowly, and Soren put his eye to the microscope first because he was the one who would notice if something went wrong.

For a few seconds, nothing. Eggs sitting in their soft coats. Then the water filled with movement, hundreds of tiny tadpole flickers swarming in from the edge, all of them rushing the nearest egg like the egg was the last open door in a building on the last bus night of the year.

"They're everywhere," Soren whispered. "There must be a thousand. They're all going for the same eggs. There's no way only one gets in. There's a hundred on each one."

"Watch the coat," Maya said. She wasn't looking. She was guessing. "Watch the coat, not the swimmers."

Soren watched one egg. One single egg with maybe forty flickering shapes crowded against its halo, pushing, pressing, the whole crowd shoving toward the door at once.

Then one got through.

He couldn't have said how he knew which one. But the instant it did, something ran across the surface of the egg. The soft coat lifted. It swelled away from the egg like a balloon being blown up from the inside, rising up off the surface in less than a heartbeat, and where it rose it went from soft to firm. A wall, lifting itself, all the way around, all at once.

And every other swimmer stopped getting in.

They kept trying. He could see them, dozens of them, still pushing, still flickering against the new firm wall, going nowhere. The door had not just closed. The door had become the opposite of a door. And the egg inside, the one that had been a could-be thirty seconds ago, was now turning, slowly, becoming something that had decided.

"It went up," Soren said. His voice had gone strange. "The coat went up like a wall. The second one got in, the whole rest of the coat, the entire thing, changed. It locked. Maya, it locked out everybody. All at once."

"How fast."

"Faster than I can say it. By the time I noticed it was already done."

Maya finally put her eye down. The egg sat in its risen wall, sealed, while the rejected crowd thinned and drifted, their one chance already over. She watched a long time.

"So every single person," she said slowly, "every single one. There was a moment exactly like that. One door, open for less than a second, and a wall that came up behind whoever got through."

"Everyone who has ever lived," Soren said. "Every name in every book. That moment happened once for each of them and never again."

They were both quiet. The pumps ticked.

"I always feel like I'm the wrong one," Maya said. It came out before she meant it to. "Like the right kid was supposed to show up and they sent me by mistake."

Soren didn't tell her that was silly. He looked back into the microscope at the wall that had risen the instant the one got through, the wall that meant there had never been a backup, never a second choice, never a do-over waiting.

"There wasn't a right one," he said. "There was a door open for a second. And the wall came up. That's why it's you. There was never going to be anybody else."

Maya pressed her lips together and looked into the lens again.

Down the hall, a metal drawer slid shut, and her mother's footsteps started toward them. Soren reached for the worksheet to put it back exactly square with the dish. Maya kept her eye to the microscope, watching the sealed egg turn in its risen coat, and she did not look up, not even when the footsteps reached the door.