Yucky Muck (IMAGE) Columbia Climate School Caption Bacteria from sewage tend to build up in Hudson River sediments, especially mucky ones like this, a new study finds. These researchers from Columbia University's Lamont-Doherty Earth Observatory were collecting sediment near New York harbor for an unrelated study. Credit Kevin Krajic/Earth Institute, Columbia University Usage Restrictions Credit must be given. 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.