Eye position varies significantly among taxonomic levels, and this variation is often shaped
by ecological and behavioral factors. Eye position is often positively associated with …

Environmental seasonality can promote the evolution of larger brains through cognitive and
behavioral flexibility but can also hamper it when temporary food shortage is buffered by …

Simple Summary Understanding variations in the morphology and age of animals along a
geographical gradient may aid in our comprehension of the evolution of these animals. In …

Simple Summary The size of an organism's organs not only relates to its body size and
physiological function, but also offers important evidence of its adaptation to environmental …

Eye size varies markedly among taxonomic levels, and this variation is often related to the
patterns shaped by phylogeny and ecological and behavioral factors. The selective …

Size changes in brain and brain regions along altitudinal gradients provide insight into the
trade‐off between energetic expenditure and cognitive capacity. We investigated the brain …

Here, we investigate the relationship between relative brain size and sexual weapons in
ruminants. In most cases, sexual weaponry is heavily male-biased, and costs resulting from …

The geographic variation in life-history traits of organisms and the mechanisms underlying
adaptation are interesting ideas in evolutionary biology. This study investigated age and …

The brain is among the most energetically costly organs in the vertebrate body, while the
size of the brain varies within species. The expensive-tissue hypothesis (ETH) predicts that …

Brain size exhibits significant changes within and between species. Evolution of large brains
can be explained by the need to improve cognitive ability for processing more information in …