From the Hammer of Boravia to the Engineer to Ultraman, we break down the many villains featured in the new Superman trailer and why Lex Luthor might be the least of the Man of Steel's worries.

The mosura fentoni was about the size of an index finger and had three eyes, jointed, spiny claws, a circular mouth with teeth, and a body with swimming fins on the sides. A group of paleontologists ...