We present a detailed reanalysis of the comparative brain data for primates, and develop a
model using path analysis that seeks to present the coevolution of primate brain (neocortex) …

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 …

The current paper synthesizes theory and data from the field of life history (LH) evolution to
advance a new developmental theory of variation in human LH strategies. The theory posits …

To explain variation in relative brain size among homoiothermic vertebrates, we propose the
Expensive Brain hypothesis as a unifying explanatory framework. It claims that the costs of a …

Large brains, relative to body size, can confer advantages to individuals in the form of
behavioral flexibility. Such enhanced behavioral flexibility is predicted to carry fitness …

In this review we attempt to reconstruct the evolutionary history of hominin life history from
extant and fossil evidence. We utilize demographic life history theory and distinguish life …

Why have some animals evolved large brains despite substantial energetic and
developmental costs? A classic answer is that a large brain facilitates the construction of …

Primates are characterized by relatively late ages at first reproduction, long lives and low
fertility. Together, these traits define a life-history of reduced reproductive effort …

Since the last common ancestor shared by modern humans, chimpanzees and bonobos, the
lineage leading to Homo sapiens has undergone a substantial change in brain size and …

Bottlenose dolphins in Shark Bay, Australia, live in a large, unbounded society with a fission–
fusion grouping pattern. Potential cognitive demands include the need to develop social …