Relative brain size has long been considered a reflection of cognitive capacities and has
played a fundamental role in developing core theories in the life sciences. Yet, the notion …

A longstanding issue in biology is whether the intelligence of animals can be predicted by
absolute or relative brain size. However, progress has been hampered by an insufficient …

Reconstructing the evolution of brain information-processing capacity is paramount for
understanding the rise of complex cognition. Comparative studies of brain evolution typically …

Despite tremendous efforts in the past decades, relationships among main avian lineages
remain heavily debated without a clear resolution. Discrepancies have been attributed to …

Social gaze has received much attention in social cognition research in both human and
non-human animals. Gaze following appears to be a central skill for acquiring social …

Noting that some theropod dinosaurs had large brains, large grasping hands, and likely
binocular vision, paleontologist Dale Russell suggested that a branch of these dinosaurs …

Birds today are the most diverse clade of terrestrial vertebrates, and understanding why
extant birds (Aves) alone among dinosaurs survived the Cretaceous-Paleogene mass …

Octopods are masters of camouflage and solve complex tasks, and their cognitive ability is
said to approach that of some small mammals. Despite intense interest and some research …

Building taxon-rich phylogenies is foundational for macroevolutionary studies. One
approach to improve taxon sampling beyond individual studies is to build supermatricies of …

Taking someone else's visual perspective marks an evolutionary shift in the formation of
advanced social cognition. It enables using others' attention to discover otherwise hidden …