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, which ...
Snails have over 1,000 microscopic teeth. Some eat leaves, but different snails eat many different things, including other snails. Photo by Jennifer Schlick Of all the flora and fauna in the region, ...
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