Explore how scientists define adulthood, and find out if there’s a specific age at which we reach maturity.Most countries recognize 18 as the start of adulthood by granting various freedoms and privileges. Yet there’s no exact age or moment in development that we can point to as having reached full maturity. If there’s no consensus on when we reach maturity, when do we become adults? Shannon Odell shares how scientists define adulthood using stages of brain development.

探索科学家是如何定义成年的，并找出我们是否有一个特定的年龄达到成熟。大多数国家承认18岁是成年的开始，给予各种自由和特权。然而，在发展过程中没有一个确切的年龄或时刻，我们可以指出已经达到完全成熟。如果对我们达到成熟的确切时间没有共识，那么我们什么时候才真正成为成年人？香农-奥德尔分享了科学家如何利用大脑发育阶段来定义成年。