Seafloor Carbon (IMAGE) University of Delaware Caption Alvin, the undersea research vehicle, has a robotic arm that deploys a hydraulic fluid sampling device with a "snorkel" that sticks into the black smoker fluid. The operation helps researchers look for old carbon and graphite. Credit Photo courtesy of Woods Hole Oceanographic Institution and the Advanced Imaging and Visualization Lab 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.