CLOCK Gene (IMAGE) UT Southwestern Medical Center Caption The discovery and cloning of the CLOCK gene by Dr. Joseph Takahashi in the 1990s elevated circadian rhythms research beyond fruit flies and put scientists in position to unlock many of the mysteries of human health and behavior. Credit UTSW Usage Restrictions None License Licensed 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.