Wing comparison (IMAGE) University of Wisconsin-Madison Caption A comparison of normal (top) and disrupted wing development (bottom) shows a missing vein (red circle) resulting from the reduction in error-checking that accompanied the wing-broadening that helped the fly adapt to living at a higher altitude. Credit Justin Lack 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.