All this time spent on string theory and we find strands. "Stretching up to 150 light-years long, the one-dimensional strands (or filaments) are found in pairs

All this time spent on string theory and we find strands. "Stretching up to 150 light-years long, the one-dimensional strands (or filaments) are found in pairs and clusters" This is surely very interesting and raises lots of lovely questions, found in pairs aspect must be indicative of something. Would love to know if the pair's spacing constant. Also, how can they be one-dimensional as my understanding is, we would not be able to measure them far away if that was the case.