Quantity counts for baboons
Peanut experiment shows that monkeys roughly compare numbers of nuts using logic similar to humans
![monkey portrait](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/05/bb_monkey_free.jpg?fit=860%2C460&ssl=1)
COUNTER INTELLIGENCE An olive baboon named Pearl, shown here, and one of her troopmates could keep tabs on approximate quantities of peanuts placed one at a time in containers. Researchers say this counting-like logic, which humans use to count exact amounts, comes naturally to monkeys.
Adam Fenster/University of Rochester Photography