Why Do We Feel Time Slip Away As We Age?

Imagine your life is a book. When you are five, every day is like turning a new page because everything is fresh and exciting. You learn to ride a bike, see snow, eat ice cream. These new memories stick out clearly. But when you turn thirty, many days look the same: work, home, sleep. Because few things change, your brain stops writing detailed pages. It skips ahead to save space.

Think about it this way. One year is twenty percent of your life when you are five. But one year is only four percent of your life when you are thirty. So that same amount of time feels much shorter relative to your whole story.

Your brain loves novelty. When you go on vacation, time seems to slow down because you see new sights and eat new foods. Your memory gets full of details. Later, looking back, it feels like a long trip. But if you drive the same route to work every day, your brain goes on autopilot. It records very little information. When you look back at those years, they flash by because there is not much stored.

Some scientists think we have an internal clock that ticks slower as we get older. This makes events feel faster. But the memory theory is stronger. We judge time by how many memories fill a period. More memories mean more time. Fewer memories mean less time.