Study Reveals Non-Linear Brain-Body Size Relationship in Mammals

New research challenges long-held beliefs, showing that larger animals do not have proportionally bigger brains, with humans as a notable exception.

Researchers analyzed brain and body sizes from 1,500 species, revealing a curved relationship between brain size and body size.
Humans have evolved significantly larger brains relative to body size, deviating from the trend observed in most mammals.
The study identified rapid evolutionary changes in brain size among primates, rodents, and carnivores.
Bats showed unique brain size changes due to the evolutionary demands of flight.
The findings suggest that very large brains might be too costly to maintain, creating a 'curious ceiling' in brain size evolution.