Using florescent markers, the researchers are able to track pairs of DNA loci in 3D, showing the interaction between distantly spaced parts of the genome. Implications in gene expression as enhancers and promoters for genes may be very far away from said gene.

Paper: https://www.science.org/doi/10.1126/science.adf5568

Sadly no SciHub :( https://sci-hub.st/https://doi.org/10.1126/science.adf5568

secure DM if you want the paper.