Children who start elementary school with difficulty associating small exact quantities of items with the printed numerals that represent those quantities are more likely to develop a math-related ...

Archaeologists working in northern Mesopotamia say they have uncovered visual patterns that look a lot like structured ...

But for animals? Evidence is mounting that other primates, and even birds and fish, can discriminate between quantities differing by only one item, at least up to a quantity of five. Cichlids and ...