The Length of You

Maya was losing the thread fight.

Two meters of red sewing thread, the spool said. She had unwound all of it onto Soren's grandmother's cutting table, and now she was trying to stuff it back into the little plastic bead she'd hollowed out for the model.

The bead was the size of a pea. The thread was a wild red nest that kept springing off the table.

"It won't go," she said. "It physically will not go."

Soren had his notebook open beside the sewing machine. He'd written the numbers down twice because the first time he didn't believe them. "That's the whole point of the project though. It does go. In you. Right now."

The assignment was to model how a cell fits two meters of DNA inside a nucleus six micrometers across. Their teacher had said it like it was nothing. Just a fact between two other facts. Maya hadn't been able to stop thinking about it since.

"Six micrometers," she said. "How small is that, again."

Soren checked. "A human hair is about seventy micrometers wide. So the nucleus is a tenth of a hair. And two meters of string goes in there."

Maya looked at the red nest. She looked at the pea-sized bead. Her brain did the thing it did, the thing where it knew an answer was wrong before it could say why.

"Stuffing is wrong," she said.

"What?"

"We're stuffing. That's why it won't go. You can't stuff two meters into anything. Stuffing makes a knot, and a knot is huge, and a knot you can never undo." She stopped. "And the cell has to undo it. It reads the DNA all the time. It can't read a knot."

Soren put his pen down. "So it's not stuffed. It's folded."

"Show me a fold that small."

They sat with that. Grandmother Lind was in the back room running the steam press, and the whole shop smelled like hot cotton. She'd told them to lock up when they finished. She had not told them how to win against thread.

Soren picked up an empty wooden spool from the bin. "What if you wind it. Around something. Wound thread takes way less room than loose thread."

Maya grabbed the spool. She started winding the red thread around it, neat, tight, turn after turn. The wild nest shrank. It actually shrank, in her hands, into a tidy band.

"Okay," she said, breathing faster. "Okay. But the spool's still too big for the bead."

"So wind the spool around something."

They stared at each other.

"You can do it again," Maya said slowly. "The wound thing. You wind the wound thing. And then you wind that."

Soren was already flipping pages, drawing. A line wrapped around a cylinder. Then that whole coil wrapped around a bigger loop. Then that loop folded into a fatter loop. Each level made of the level below it.

"It's coils made of coils," he said. "Every time you coil it, the length basically disappears. You don't fight the length. You just keep coiling."

Maya took the bin of empty spools and the thread and started building it for real. Thread wound onto a thin nail. Tiny coil. She wrapped a dozen of those coils into a clump, and the clump wound around a pencil, and she looped the pencil-coil back and forth and pressed it flat.

The two meters of red thread sat in her cupped hands. It was the size of a walnut now. Then she squeezed, and folded the folds, and it was the size of a grape.

"It's still not a pea," she said. But her voice had gone quiet, because she could feel that it would get there. Every fold was the same trick. There was no bottom to the trick. You could just keep going.

Soren wasn't writing anymore. He was looking at his own hand.

"Maya. Every cell. Not just one. Every single cell in your whole body is doing this. Right now. The two meters, wound up the exact right way so the cell can still find any piece of it and read it and let it go again."

"How many cells," Maya said.

"Trillions. Like thirty trillion."

She did the next part out loud because she had to. "Two meters in each one. Thirty trillion of them." She stopped winding. "If you unwound all of it. All the thread in all of me."

Neither of them could hold the number. It went past the moon. It went past the sun, there and back, more times than either of them could picture. All of it folded into a body small enough to sit in a fabric shop and lose a fight with a spool.

"And nobody designed the folding," Soren said. He said it like he was testing whether it was allowed to be true. "There's no engineer. No instructions taped inside. The molecule just knows how to coil itself up so it never tangles."

Grandmother Lind's steam press hissed in the back. Maya looked at the doorway, where the light from the back room cut a line across the floor, then back at the grape-sized knot of red thread that wasn't a knot at all. There was room. The trick was the folding. The being full was not the problem. The being full was the whole design.

"Try it now," Soren said.

Maya held the bead up. She pressed the folded thread against the little opening she'd hollowed.

"It won't," he said, but he was leaning in to watch.

She folded it once more, the smallest fold, coils inside coils inside coils, and pushed.

The two meters slid into the pea-sized bead and disappeared. She held it up to the light from the back room. It rattled, barely, the whole red length of it, hidden and waiting and perfectly untangled inside a thing she could lose between two fingers.

Maya closed her hand around the bead and pressed it flat against her chest, against the front of her shirt, where the trillions were.