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

Ultrafast Electron Microscopy Laboratory, The MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China ...

Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China ...