Human brains have five distinct phases, with adolescence lasting until our early 30s: study CTV NewsTopological turning points across the human lifespan NatureAdolescence lasts into 30s – new study shows four pivotal ages for your brain BBCBrain has five ‘eras’, scientists say – with adult mode not starting until early 30s The GuardianHuman brains have 5 distinct ‘epochs’ in a lifetime, study finds NBC News