Fly Tracks (image) University of California - San Diego Caption Normal fruit flies (left) quickly found a female at the center of the testing arena, whilst flies unable to calibrate their olfactory systems (right) wandered aimlessly. Track color depicts time beginning with violet and ending with red. Credit Cory Root/UCSD Usage Restrictions None 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.