Seashells are so plentiful that you may sometimes take them for granted. Scientists have estimated that just one small stretch of beaches along the Gulf of California contained at least 2 trillion ...

Add Yahoo as a preferred source to see more of our stories on Google. It's hard to go to any beach without looking for a treasure or two in the sand. Florida's coastline is full of shells both rare ...

Tsukuba, Japan—Mollusks exhibit diverse shell morphologies, such as those seen in bivalves (e.g., clams) and gastropods (e.g., snails). Understanding the mechanisms underlying shell formation requires ...