Mountain lions are known by many names: panthers, pumas, cougars, and catamounts, for example. However, there is one moniker that perfectly describes one of their more unusual characteristics: the ...

Add Yahoo as a preferred source to see more of our stories on Google. During ritual ceremonies, the ancient Aztec civilization used a “death whistle” — a haunting instrument shaped like a human skull.

If you have ever been awake late at night and heard a strange, high-pitched scream echoing through the darkness, you might have wondered what it was. Many people describe it as frightening, almost ...