You rarely catch a cookiecutter shark in action. Instead, you notice the marks it leaves behind: neat, circular holes resembling the cut of a cookie cutter. But scientists have managed to use the few clues available to sketch out…

You rarely catch a cookiecutter shark in action. Instead, you notice the marks it leaves behind: neat, circular holes resembling the cut of a cookie cutter. But scientists have managed to use the few clues available to sketch out…