In a tally of nerve cells in the outer wrinkles of the brain, a dog wins
Comparing neuron numbers across species could provide clues to animals’ smarts
![composite image of various animals](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/12/120517_LS_brain-comparison_main.jpg?fit=860%2C460&ssl=1)
BRAIN GAME Despite being relatively large, a brown bear’s brain is sorely lacking in nerve cells, while a raccoon’s cat-sized brain is packed full, finds a new study that tallies these neurons in carnivores.
Jeremy Teaford/Vanderbilt University