https://www.quantamagazine.org/how-animals-map-3d-spaces-surprises-brain-researchers-20211014/
How Animals Map 3D Spaces Surprises Brain Researchers
Jordana Cepelewicz
October 14, 2021
When animals move through 3D spaces, the neat system of grid cell activity they use for navigating on flat surfaces gets more disorderly. That has implications for some ideas about memory and other processes.
“…scientists working with bats and rats showed — to their surprise — that the brain encodes 3D spaces very differently from 2D ones, employing a mechanism that they are still struggling to describe and understand.”