The creatures cruised the world’s oceans with features we often associate with marine mammals, such as coats of blubber and ...

they roll their head in a circular motion, using the lower teeth like a blade to tear off circular chunks of flesh. Smaller prey is eaten whole. This mysterious shark is not often seen by cameras ...

The footage counts as a first on several levels, including giving biologists a “shark’s eye view” of what it’s like to encounter something bigger and badder in the neighborhood.

the “Flying Tigers,” made the shark mouth famous, but they weren’t the first to paint it on airplanes. During World War I, a few German pilots painted eyes and a closed-mouth frown on their ...