Just over 50 years ago, paleontologist Donald Johnson unearthed the remains of "Lucy," an ancient human relative who lived ...

The lion has the loudest roar of all the big cats ... helped by swivelling ears that adjust to the direction that sound is coming from. Their sensitive hearing means they are able to stalk ...

Well, there are a few problems there, too. Take that iconic lion roar. Sounds majestic, right? Just like the famous MGM roar. Here's the issue: A lion's roar doesn't sound like that. This is a roar.