Scientists Explained Why Time Passes Faster as We Age

Most people feel that days, weeks, and even years pass in the blink of an eye. Especially in childhood, those endless long summer days or seemingly never-ending school lessons are replaced in adulthood by time intervals that seem to vanish in an instant. This perceptual change is not merely a nostalgic feeling or a psychological illusion. On the contrary, there are scientific and physiological reasons underlying this noticeable acceleration we feel in the flow of time. The research published in the European Review journal by Prof. Dr. Adrian Bejan from Duke University scientifically explains the main reasons behind this interesting phenomenon.

According to Prof. Bejan's research, the main source of this dramatic change in time perception is our brain's visual information processing speed. The human brain measures the flow of time by perceiving changes and new images occurring around it. The brains of babies and young children have the capacity to process what is happening around them at an incredible speed. For this reason, the number of images perceived and processed per unit of time during childhood is significantly high. Children's desire to explore the world and their constant state of gathering new information also support this intensive visual processing period. It is precisely this intense flow of data that causes time to feel as if it is passing slowly during childhood years.

However, as a person ages, the brain's speed of processing images slows down noticeably. Compared to childhood, an adult brain perceives and processes far fewer new images within the same time frame. The decrease in environmental stimuli and the establishment of routines lead the brain to evaluate new information at a much slower pace than before. Even though objective time measured by a clock continues to pass at the same speed mathematically at every age, this conceptual speed difference in the brain directly affects the perceived duration. As a result, the decrease in the brain's data processing capacity per unit of time creates the feeling that time passes much faster in adulthood.

Another important reason for this acceleration in time perception is the age-related changes in the brain's physical structure. As age progresses, the sizes and scope of complex neural networks in the brain gradually increase. This structural expansion significantly lengthens the physical path that electrical signals must travel between nerve cells. The necessity for signals to cover longer distances within the brain naturally causes the information processing time to lengthen and slow down. Therefore, along with aging, the large and complex network structure of the brain physically delays its own internal communication speed.

In addition to this, the natural aging process paves the way for the accumulation of some microscopic damage in the nervous system over time. This wear and tear at the cellular level and the structural deteriorations occurring in the nerves are another critical factor negatively affecting mental processing speed. In light of all these physical and neurological data, the answer to why the endlessly long days of childhood vanish in an instant today is based on an extremely clear and scientific foundation. This research, also shared by TÜBİTAK, proves that the common human experience regarding the flow of time is actually closely related to brain biology. Even if time flows at the same speed for everyone, the way we experience it is strictly dependent on our brain's capacity, which changes with age.