The Worm Who Remembered

The science fair was three days gone, and the planarians were still alive on Soren's kitchen counter, swimming in their dish like tiny cross-eyed arrows.

Maya had trained them. That was the whole project. You put a planarian in a dish, you shine a light, then you give a small buzz of current, and after enough times the worm learns the light means the buzz is coming. It starts to scrunch up at the light alone. They had a worm named Pickle who scrunched faster than any of the others.

"The judges said it was a behavior project," Maya said. "It wasn't. It was a memory project."

"It was both," Soren said. He was writing the water temperature in his notebook. "They didn't read the part about where memory lives."

That was the part that wouldn't leave Maya alone. The thing on her list that didn't make sense yet. A planarian had a head, a clump of nerves you could almost call a brain. Pickle had learned with that brain. So the memory was in the head. Obviously.

"Cut Pickle's head off," Maya said.

Soren put down his pen. "What."

"Not to be mean. They grow back. The book said one worm cut into pieces makes that many worms. All of them whole." She was already moving the dish under the light. "So if memory lives in the head, the tail grows a new brain that never learned anything. Blank. Right?"

Soren thought about it the way he thought about everything, which was to test the conclusion before he let himself want it. A new brain would be a new brain. New brains don't know things. "Right," he said. "The tail piece should forget."

They did it carefully, with a fresh blade and steady hands, and Maya did not flinch, because flinching would have made it about her and not about Pickle. The two halves drifted apart in the water like a sentence cut in the middle. The head half had the eyespots. The tail half had nothing that could see, nothing that could think, nothing that should remember a light it had no eyes to fear.

Then they waited. Regeneration is not fast. They fed the halves liver scraped thin, and changed the water, and over a week and a half the head grew a new tail and the tail grew a new head, a tiny pale knob with two new eyespots pushing through like seeds.

"Two Pickles," Soren said.

"One Pickle and one stranger," Maya said. "The tail one is the stranger. New head. Knows nothing."

That was the prediction. They were sure of it. So sure that Soren wrote it down in advance, which he liked to do, so the universe couldn't talk him out of what he'd actually expected.

The test was simple. Light, no buzz. Just the light, to see who scrunched.

They did the head-Pickle first. The light came on. Pickle scrunched almost at once, fast and certain, the way Pickle always had.

"Still remembers," Maya said. "Fine. Same head, same brain. We knew that."

Then the tail one. The stranger. The one with the brand-new head that had never seen a light in its life, that had grown its eyes fresh in the last few days, that should have been an empty page.

Maya turned on the light.

The stranger scrunched.

Not slowly. Not like an accident. It pulled itself in the same quick way Pickle did, like it was bracing, like it knew.

Maya didn't say anything for a moment. She turned the light off. She turned it on again. The stranger scrunched again.

"Do it six times," she said, very quietly, and Soren did, because that was his job, to not believe a thing until it had happened six times. Light. Scrunch. Light. Scrunch. Light. Scrunch.

Six.

"The new head remembers," Soren said. His voice had gone careful in the way it went careful when something was too big to hold. "It grew a brand-new brain and the brand-new brain already knew."

Maya was staring at the dish. "Then the memory wasn't only in the head."

"It can't have been. The tail had no head. The tail kept the lesson anyway." Soren looked at his own prediction on the page, the one that said the tail should forget, and he did not cross it out, because being wrong this loudly was the most interesting thing that had happened to him all year. "It's stored somewhere else too. In the body. In the whole worm."

Maya pressed her finger gently to the side of the dish, near the stranger. "Cut it into a hundred pieces," she whispered, not as a plan, just to feel the shape of it. "You'd get a hundred worms. And every single one of them would scrunch at the light."

They sat with that. A hundred bodies, each one whole, each one carrying the same small memory of a light and a buzz that only one of them had ever lived through. The lesson copied into every piece, written somewhere that wasn't a brain at all, somewhere under the skin, in the nerves running the whole length of the body, in a place scientists are still arguing about right now.

"Everybody thinks memory is a head thing," Maya said. "A brain thing. Top of the body, behind the eyes. That's where you keep who you are."

"This worm keeps who it is everywhere," Soren said. "You could take any inch of it and the inch knows."

Maya thought about her own head, the place she'd always pictured her list living, all the things that didn't make sense yet stacked up behind her eyes. She had been so sure that was where a person was kept. She felt, suddenly, that she didn't actually know where she was kept. That nobody had checked. That the answer might be stranger than the question.

"The judges said it was a behavior project," she said again, but she was almost laughing now.

"They didn't read the part where the body remembers," Soren said.

They put the two Pickles back together in the big dish, the original and the stranger that knew everything the original knew, swimming circles around each other under the kitchen light.

Maya reached over and switched the light on. Both worms scrunched at the exact same instant.