Sleepy Fruitfly (IMAGE) University of Pennsylvania School of Medicine Caption This is a sleepy fruitfly. Credit Jini Naidoo, Ph.D., Perelman School of Medicine 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.