Researchers have discovered that people born in more recent decades have larger brain volumes compared to those born in earlier decades.
A new study suggests that decreases in brain size in modern humans may be driven by natural selection in response to climate change and environmental stress, starting around 15,000 years ago.
During human evolution, the size of the brain increased. A new research shows that serotonin can act as a growth factor for the stem cells in the fetal human brain that determine brain size.
