Neuroscientists are uncovering why time flies when you’re having fun. It’s an interesting phenomenon. Your weekend party was so fun that it seemed to go by in a flash, but Monday morning’s paperwork feels like a never-ending loop from Doctor Strange! To uncover more about our perception of time, neuroscientists in Portugal examined the brains of mice and mapped out the neural pathways involved in how we under-/overestimate the clock. They suggest that the key is dopamine—a feel-good neurotransmitter that makes us happy and may put time on fast-forward. One way to increase dopamine in your diet is to eat tyrosine—the amino acid that our body uses to make dopamine.