It's one of the most iconic images in cinema: a lion, framed by a golden circle of film stock, triumphantly roaring just before the opening credits roll. Now, after almost 100 years and more than ...

Just like the famous MGM roar. Here's the issue: A lion's roar doesn't sound like that. This is a roar. It's not quite as majestic as what you hear in the movie, but that sound can still travel up ...