The neurons themselves don’t form grids. A map of the points where firing of a grid neuron in happens the real world forms a triangular/ hexagonal grid. These

The neurons themselves don’t form grids. A map of the points where firing of a grid neuron in happens the real world forms a triangular/ hexagonal grid. These neurons seem to have discovered what board gamers found out much later - hexagonal grids are better for calculating movement. https://en.m.wikipedia.org/wiki/Grid_cell https://en.m.wikipedia.org/wiki/Grid_cell