Secondary Overgrowth (IMAGE) UiT The Arctic University of Norway Caption The foraminifera shell with secondary overgrowth (pink), a carbonate deposit that was previously considered to be sample contamination. In fact, it provides scientists with an enormous amount of information regarding methane emissions from the ocean floor. Photo: Chiara Borrelli Credit Chiara Borrelli Usage Restrictions CCBY 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.