Thanks to a mouse watching clips from “The Matrix,” scientists have created the largest functional map of a brain to date.

"You get a sense of how complicated you are. We're looking at one tiny part ... of a mouse's brain and the beauty and complexity that you can see in these actual neurons and the hundreds of ...

This image provided by the Allen Institute on April 8, 2025, shows a digital representation of neurons in a section of a mouse's brain, part of a project to create the largest map to date of brain ...