A_Time In The Brain (IMAGE) University of Nevada, Las Vegas Caption A UNLV-led neuroscience study found that we perceive the passage of time based on the number of experiences we have — not some kind of internal clock. Credit Talha K. Soluoku/UNLV Usage Restrictions N/A. Please credit the illustrator. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.