Which structure is described as stretching 1.3 billion light-years and resembles knotted strings?

Answer

Quipu

Quipu is described as stretching about 1.3 billion light-years long, slightly longer than the Sloan Great Wall, and is named after the ancient Incan method of recording information using knotted strings.

Which structure is described as stretching 1.3 billion light-years and resembles knotted strings?

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