The stages of growth have always been associated closely with the physical changes seen in the body. As the infant grows to a toddler and then to a child, it is easy to see the changes. The child reaches the height of an adult around their late teens and this is why most countries concur that people reach their majority, or adulthood at the age of either 18 or 21 years depending on your country of residence.

A new study conducted by neuro scientists at the University of Cambridge, is looking into the changes that the brain undergoes when growing up. One thing is for certain, the brain develops at different times in every individual. So to define a specific age when a person moves from childhood to adulthood, is practically impossible in terms of brain development.

The degree of individual brain variability only begins to level out when people reach their thirties. This means that effectively the brain of an adult is only seen in people who are aged or more! So if you are below thirty, it’s fine to be considered childish. Now here’s a science project that gives you licence to act as a child for a little while longer.