If you open a book, you’ll see lots of letters that come together to make different words. Sandwiched in between the words are little dots, lines and squiggles called punctuation marks. But why do we need those, when they don’t make any sounds at all? We asked writing teacher Kristin Bauck to help us find the answer.Got a question that’s right on the mark? Send it to us at BrainsOn.org/contact – we can’t punc-tu-WAIT to help you answer it!