A seaside snail crawling along the gooey streak left by another snail is saving a lot of energy, say researchers, because it doesn’t have to ooze so much slime itself. “It’s much, much more expensive ...

The oddball minority of animals that don’t lay eggs includes a tough little snail called a rough periwinkle. Unlike mammals giving birth to kittens and fawns and helpless little humans, this ...

Periwinkles, the spiral-shelled snails commonly found along rocky U.S. shorelines, play a primary role in the unprecedented disappearance of salt marsh in the southeastern states, according to new ...