Image 2 (IMAGE) Aarhus University Caption Microscope image of cable bacteria reaching one end out for oxygen. The deformed oxygen front is seen as a milky line consisting of smaller bacteria attracted to the interface with the lower oxygen free layer. Credit Photo: Stefano Scilipoti Usage Restrictions May be used in relation with 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.