Recently, scientists have discovered that the brain does not fully mature until the early 20s, and the last to mature are the areas responsible for controlling impulses and considering the consequences of one’s actions. In fact, there is evidence suggesting that the process of brain development is gradual and based on an individual rate of development, making an official age separating juveniles from adults arbitrary, at best.

Multiple studies of the human brain show that the cerebral cortex, which [...]