String theory & Geometry: tensor networks, entanglement, and correlations in geometry when viewed at Planck scales.  The animation "imagines entanglement creating space-time gradually: Along the outside of the figure, individual particles (dots) become entangled with each other. These entangled pairs then become entangled with other pairs. As more particles become entangled, the three-dimensional structure of space-time emerges."  This, according to Mark van Raamsdonk, a string theorist at University of British Columbia in Canada.

This is an interesting and well-written article by Jennifer Oullette on an area of physics that is probing the fundamental nature of space-time and therefore geometry.