Across the animal kingdom, we see remarkable variation in brain size. This variation has
even increased over evolutionary time. Traditionally, studies aiming to explain brain size …

When exploiting the environment, animals have to discriminate, track, and integrate salient
spatial cues to navigate and identify goal sites. Actually, they have to know what can be …

The presence of general intelligence poses a major evolutionary puzzle, which has led to
increased interest in its presence in nonhuman animals. The aim of this review is to critically …

Mammals are the most encephalized vertebrates, with the largest brains relative to body
size. Placental mammals have particularly enlarged brains, with expanded neocortices for …

Comparative studies have identified a wide range of behavioural and ecological correlates
of relative brain size, with results differing between taxonomic groups, and even within them …

Not all tropical fruits are equally desired by rainforest foragers and some fruit trees get
depleted more quickly and carry fruit for shorter periods than others. We investigated …

Environmental variability has long been postulated as a major selective force in the
evolution of large brains. However, assembling evidence for this hypothesis has proved …

Humans stand out among the apes by having both an extremely large brain and a relatively
high reproductive output, which has been proposed to be a consequence of cooperative …

Primates, like other mammals, exhibit an annual reproductive pattern that ranges from strictly
seasonal breeding to giving birth in all months of the year, but factors mediating this …

The prevailing hypotheses for the evolution of cognition focus on either the demands
associated with group living (the social intelligence hypothesis (SIH)) or ecological …