Which established cosmological concept is potentially challenged by the existence of structures like Quipu, which are over 1.2 billion light-years across?

Answer

The cosmological principle

The existence of structures exceeding about 1.2 billion light-years might be incompatible with the cosmological principle, which suggests the universe should look roughly the same everywhere on the largest scales.

Which established cosmological concept is potentially challenged by the existence of structures like Quipu, which are over 1.2 billion light-years across?
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