Comparative analyses are the backbone of evolutionary analysis. However, their record in
producing a consensus has not always been good. This is especially true of attempts to …

Phenotypic traits are products of two processes: evolution and development. But how do
these processes combine to produce integrated phenotypes? Comparative studies identify …

Despite prolonged interest in comparing brain size and behavioral proxies of" intelligence"
across taxa, the adaptive and cognitive significance of brain size variation remains elusive …

Adaptive radiation is hypothesized to be a primary mechanism that drives the remarkable
species diversity and morphological disparity across the Tree of Life. Tests for adaptive …

The brain is a trait of central importance for organismal performance and fitness. To date,
evolutionary studies of brain size variation have mainly utilized comparative methods …

Cetaceans rival primates in brain size relative to body size and include species with the
largest brains and biggest bodies to have ever evolved. Cetaceans are remarkably diverse …

Background Most evolutionary studies on the size of brains and different parts of the brain
have relied on interspecific comparisons, and have uncovered correlations between brain …

We use a recent wave of data to confirm that Haller's rule of brain–body allometry, for
smaller species to have relatively larger brains, holds for invertebrates as well as …

Gorillas and orangutans are primates at least as large as humans, but their brains amount to
about one third of the size of the human brain. This discrepancy has been used as evidence …

Extensive studies of vertebrates have shown that brain size scales to body size following
power law functions. Most animals are substantially smaller than vertebrates, and extremely …