If you hold up a seashell to your ear and listen, you may hear what sounds like rolling waves and wind. But it’s not actually the ocean. Now that we’ve got that out of the way, what exactly is it that ...

We’ve all done it: held a seashell up to our ear and waited for the sound of the sea. It’s one of those strange little wonders that sticks with you from childhood, but what’s actually going on inside ...