Invisible clouds of sediment created by underwater mining spread for miles, putting ocean floor ecosystems at risk.

When bottom trawls are dragged across the seafloor, they stir up sediments. This not only releases previously stored organic carbon, but also intensifies the oxidation of pyrite, a mineral present in ...

image: An MIT team has developed a more accurate formula to calculate how much sediment a fluid can push across a granular bed, which could help engineers manage river restoration and coastal erosion.