Do you really know? At what age do we really become adults?
Mar 13, 2026
The podcast contrasts legal ages with brain science and explains which brain regions keep maturing after 18. It highlights a Cambridge study that maps five life stages and suggests adolescence can extend into the early 30s. Cultural views are compared, showing how different societies mark becoming an adult. The episode argues adulthood hinges on roles, skills, and self-perception rather than a single age.
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Legal Age Vs Brain Maturity
- Legal adulthood ages vary worldwide and don't match brain development stages.
- Amber Minogue cites neuroscience showing the prefrontal cortex and cerebellum keep developing, affecting impulse control and planning.
Brain Development Extends Well Into Thirties
- Brain regions mature at different rates so 'adult' brain function is variable across people.
- A large study tracked 3,000+ scans and mapped five life stages, finding adolescence can extend to about age 32.
Late Developing Regions Drive Self Regulation
- Specific functions tied to late-developing regions include emotion regulation, planning and impulse control.
- Amber Minogue references a 2009 Journal of Adolescent Health study highlighting the prefrontal cortex's role.