A new scientific study has identified key ages in brain development, with some reports suggesting four pivotal ages and others indicating five distinct eras. The study appears to have found significant changes in brain development at various ages, including potentially during childhood, adolescence, and adulthood, with some sources specifying ages 9, 32, 66, and 83 as notable turning points. However, the exact number and timing of these developmental milestones are not consistently reported across different outlets.