Mystery Roar Detected From Faraway SpacePosted: 1/8/2009 12:00:00 AM Reads: 253 Submitted By:jeff Category: Space Source: www.foxnews.comThe roar is from the distant cosmos. Nobody knows what causes it. Of course, sound waves can’t travel in a vacuum (which is what most of space is), or at least they can’t very efficiently. But radio waves can. COMMENTS Please log in to comment.