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. Seashells are so plentiful that you may sometimes take them for granted. Scientists have estimated that just one small stretch of ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Scientists have estimated that just one small stretch of beaches along the Gulf of ...