The Goat That Made Rope

The milk from the third goat looked exactly like the milk from the other goats.

That was the first thing Maya said, kneeling by the pail. "It's just milk."

"It's supposed to be just milk," said Soren. He had the farm's laminated card in his hand, the one Mr. Okafor had given them before he went back to the tractor that would not start. "Look at goat number three's ear tag. The card says her milk has a spider protein in it."

"A spider protein." Maya lifted the pail and squinted at it against the barn light. "From a spider."

"From the gene of a spider. They put one instruction from an orb weaver into the goat, a long time ago, back when this was a research farm. The goat's body reads the instruction in her milk-making the same way it reads all its other instructions." He read further down the card. "The protein is dragline silk. The stuff a spider hangs from."

Maya put a finger in the milk and rubbed it against her thumb. "I can't feel a spider in it."

"You wouldn't. It's dissolved. One protein floating in a whole lot of milk." Soren frowned. "That's the part I don't get. The card says the fiber is stronger than steel by weight. But this is a puddle. How do you get rope out of a puddle?"

Maya was already looking at the corner of the barn, where a real spider had built a real web across the window.

"Ask her," Maya said.

"Ask the spider."

"She does it every night. She's got a puddle of the same stuff inside her and she pulls a thread out of it that holds her whole body up. So she knows the trick." Maya walked to the window. The spider sat dead center, patient. "The silk isn't a thread inside her. It's liquid inside her. It only becomes a thread when she pulls it out."

Soren stood up so fast he almost kicked the pail. "Say that again."

"It's liquid until she pulls it."

"The pulling is the thing." He was talking fast now. "The protein's in there loose, folded up soft. When the spider drags it out through a tiny spout, the pulling and the squeezing line all the proteins up the same direction. They lock together. That's what makes it strong. It's not strong because of what it is. It's strong because of how she pulls it."

Maya turned from the window. "So the milk is the puddle."

"And nobody's pulled it yet."

They looked at the pail together.

"We can't drink a spider out of a goat and get rope," Maya said. "We'd need to get the protein by itself first. Out of all the fat and the sugar and the rest of the milk."

"Separate it," Soren agreed. "Which they do in a real lab with real machines. We don't have those." He chewed the inside of his cheek. "But I keep thinking about the spout."

"The spout."

"The spider doesn't just have silk. She has a spout the exact right size, and she pulls at the exact right speed. Change either one and the thread comes out weak. It's not enough to have the stuff. You have to treat the stuff exactly right on the way out." He looked at the pail like it had insulted him. "We could have the actual protein in our hands and still make garbage."

Maya crouched by the web again. The morning light came through it sideways and every strand lit up like a wire.

"Soren. How thin is that?"

"The strand? Way thinner than a hair. Thousands of times thinner than the rope they can spin from the goat stuff."

"And it holds her whole weight."

"When she jumps, it catches her. It stretches, it doesn't snap. Steel would snap." He said it and then heard himself say it. "Steel would snap and spider silk would catch her."

They were both quiet. Outside, Mr. Okafor's tractor coughed and died again.

Maya said, slowly, "So the goat is carrying an instruction from a spider. And the instruction still works. Even in a goat. Even in milk. The goat has never seen a web. She doesn't know she's making it. But it's the same protein, folded the same way, waiting for the same pull."

"The instruction doesn't care what body it's in," Soren said. "That's the whole thing. The recipe for the strongest thread we know how to grow isn't written in spider. It's just written. You can copy it into a goat and it still reads true."

Maya sat all the way down in the straw. "Then it could go into anything. Anything that can read instructions."

"It has. Bacteria. Yeast. Plants, I think. People have grown the spider protein in leaves." Soren crouched next to her, the card forgotten in his hand. "The spider figured out how to make something stronger than steel out of flies and patience. And the how is just a sentence. And we can read the sentence now. And we can hand it to a goat."

"We can hand a spider's sentence to a goat," Maya repeated. She was grinning now. "And the goat says it back in milk."

The barn spider adjusted one leg. A strand of her web trembled and held.

Soren looked from the web to the pail and back. "We still can't spin it here. We'd need the spout. We'd need to pull it right."

"I know." Maya wasn't upset. She dipped her finger in the milk one more time, watching the white drop hang off the tip and stretch before it fell. "But it's in there. Right now. Under my finger. The same thread she's hanging from. Just folded up, waiting for somebody to pull."

The drop stretched thin between her finger and the surface, a single white filament, and held for a moment longer than milk should.

Then it broke, and fell back into the pail, and the spider in the window began, without hurry, to rebuild the strand a moth had torn in the night.