Domestic chickens are members of an order, Aves, which has been the focus of a revolution
in our understanding of neuroanatomical, cognitive, and social complexity. At least some …

The ability to use quantitative information is thought to be adaptive in a wide range of
ecological contexts. For nearly a century, the numerical abilities of mammals and birds have …

Large-scale data sets of human behavior have the potential to fundamentally transform the
way we fight diseases, design cities, or perform research. Metadata, however, contain …

Humans represent numbers along a mental number line (MNL), where smaller values are
located on the left and larger on the right. The origin of the MNL and its connections with …

Here we investigate the counting ability in honeybees by training them to receive a food
reward after they have passed a specific number of landmarks. The distance to the food …

Background Research on human infants, mammals, birds and fish has demonstrated that
rudimentary numerical abilities pre-date the evolution of human language. Yet there is …

Chicks were trained to discriminate small sets of identical elements. They were then tested
for choices (unrewarded) between sets of similar numerosities, when continuous physical …

A large body of experimental evidence shows that animals as diverse as mammals, birds,
and fish are capable of processing numerical information. Considerable differences have …

Studies on the ontogenetic origins of human knowledge provide evidence for a small set of
separable systems of core knowledge dealing with the representation of inanimate and …

There is a longstanding and widely held misconception about the relative remoteness of
abstract concepts from concrete experiences. This review examines the current evidence for …