Delay discounting refers to the decrease in subjective value of an outcome as the time to its
receipt increases. Across species and situations, animals discount delayed rewards, and …

Nutcracking capuchins are mentioned in reports dating as far back as the sixteenth century,
1, 2 as well as in Brazilian folklore. 3 However, it was barely a decade ago that …

Many animals, including humans, acquire valuable skills and knowledge by copying others.
Scientists refer to this as social learning. It is one of the most exciting and rapidly developing …

The study of the archaeological remains of fossil hominins must rely on reconstructions to
elucidate the behaviour that may have resulted in particular stone tools and their …

Within-group variation in sociality has been linked to correlates of fitness across vertebrates.
Individuals that form strong social bonds with a few partners, or are well integrated into a …

Despite numerous attempts to define animal tool use over the past four decades, the
definition remains elusive and the behaviour classification somewhat subjective. Here, we …

We have learned much about tool use in nonhumans since the discovery of Oldowan stone
tools. Despite the ongoing debate over whether tool use in other animals requires cultural …

Attachment is not an exclusively human phenomenon. Although the theory that John Bowlby
conceived and developed during the 1950s and 1960s reflected his clinical observations of …

All modern humans use tools to overcome limitations of our anatomy and to make difficult
tasks easier. However, if tool use is such an advantage, we may ask why it is not evolved to …

Appreciation of objects' affordances and planning is a hallmark of human technology.
Archeological evidence suggests that Pliocene hominins selected raw material for tool …