Of all the myths that dog the wolf, none is more widely accepted than the idea that wolves howl at the moon. Images of wolves with their heads upturned, singing at the night sky, are as unquestioned ...

MARTIN: But - and I confess, I have wondered about this - do wolves really howl at the moon? MICHELLE MANCINI: They don't necessarily howl under the full moon. There's not a mystical element behind it ...

A wolf's howl is one of the more iconic sounds of nature, yet biologists aren't sure why the animals do it. They're not even sure if wolves howl voluntarily or if it's some sort of reflex, perhaps ...