Attempts to relate brain size to behaviour and cognition have rarely integrated information
from insects with that from vertebrates. Many insects, however, demonstrate that highly …

The “social brain hypothesis” posits that the cognitive demands of sociality have driven the
evolution of substantially enlarged brains in primates and some other mammals. Whether …

Miniaturized species have evolved in many animal lineages, including insects and
vertebrates. Consequently, their nervous systems are constrained to fit within tiny volumes …

As bridges or brains become bigger or smaller, the changes pose problems of design
thatneed to be solved. Larger brains could have larger or more neurons, or both. With …

The role of brain size as a cost of learning remains enigmatic; the nature and timing of such
costs is particularly uncertain. On one hand, comparative studies suggest that congenitally …

Current perspectives on brain evolution relate brain size variability to two main parameters:
a scaling factor that corresponds to overall body size and an ecological factor associated …

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 …

Neurons are the basic computational units of the brain, but brain size is the predominant
surrogate measure of brain functional capacity in comparative and cognitive neuroscience …

Brain size variation over primate evolution and human development is associated with shifts
in the proportions of different brain regions. Individual brain size can vary almost twofold …

Evolution has generated mammalian brains that vary by a factor of over 100,000 in mass.
Despite such tremendous diversity, brain scaling in mammalian evolution has tacitly been …