"Functional Magnetic Resonance Imaging has shown that the brain has little “pathways” that information and dopamine and everything move along. These can form new connections when confronted with novel stimulus, but will reinforce existing connections if the environment is stagnant.
In other words, doing things you’ve never done before will prompt your brain to increase the number of pathways inside it, which may help you to develop a new outlook on life or even become more creative."