You probably have a good idea what a lion sounds like. Cue mighty roar. But scientists have just discovered that lions have a second, previously unnoticed type of roar, challenging long-held beliefs ...

DETROW: Or some version of that sound. This particular roar comes courtesy of a lion named Jeronimo (ph). Well, what if I told you that this sound... (SOUNDBITE OF LION ROARING) DETROW: ...Was also a ...