For most of human evolution, the story of the brain seemed to move in one direction. It got bigger. That long rise is still there in the fossil record. But a new analysis argues that the trend did not ...

A study of 225 newborns suggests prenatal estrogen may have played a role in the evolution of larger human brains. Boys with finger-length patterns linked to higher estrogen exposure before birth ...

A new study, published July 6, 2026, in the journal Nature Communications, suggests that two of the best-known trends in human evolution—brain growth and the reduction in the size of the face and ...

Human-AI interactions can resemble human-human social interactions, with computers, and especially AI-driven technologies, becoming increasingly important social actors. It is in these interactions ...