Starting when he was a Ph.D. student in the 1990s, he has monitored the evolution of two common species of sea ... the snails through "risk cues" like smell and hormones—grew thicker shells ...

All mollusks build their own shells, whether they live in water or on land. Creatures like snails, clams, oysters and mussels use an organ called a mantle to secrete layers of calcium carbonate ...

The sea snail with shell measures a little less than 2 centimeters. Although the sea creature is found in colonies at a beach only minutes from the school, it is designated as a near-threatened ...