Experiments on domestic chicks shed light on the links between brain lateralization and the left-to-right mental number line.

A study in newborn chicks shows that brain lateralisation is essential for the development of a left-to-right mental number line.

Like many humans, honeybees seem to prefer their numbers ordered from left to right. Honeybees trained to recognize a specific number tend to fly left when given two side-by-side options of a smaller ...