Brain’s growth, networks unveiled in new maps
Human, mouse brains probed in detail
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/04/ls_Image6_whole_cortex.jpg?fit=860%2C460&ssl=1)
MAPPED OUT This top-down view of the mouse brain shows spindly connections made by neurons in distinct brain regions (marked by different colors).
Allen Institute for Brain Science