A new study proposes that the massive ancient shark was built more slenderly than a great white. But not all paleontologists ...

The Leviathan is believed to have lived 12 million to 13 million years ago, and ultimately became extinct 5 million years ago. Shark Week starts Sunday at 8 p.m. and will end Saturday July 13.

The ocean liner Leviathan was one of the largest and most popularly recognizable passenger ships on the Atlantic in the 1920s. Like all ocean liners, the ship was at once a complex and powerful ...