Tearing a Ribbon of Air (IMAGE) University of Chicago Caption Asymmetrical pinch-off of a burst of air from a slot-shaped nozzle. The top series shows a broad neck with a scalloped profile that results from slower bursts. The neck becomes more ribbon-like from faster bursts in the middle series. The ribbon thins until a hole forms in the center of the neck. Faster bursts also can produce off-center tearing, as shown in the bottom series.Nathan Keim, University of Chicago Credit Nathan Keim, University of Chicago Usage Restrictions This image may be used to illustrate news reports in connection with the findings described in this news release. 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.