A team ventured into the 2,000-year-old structures under a town in Spain and found some unfamiliar-looking animals. Take a look.

The Mosura fentoni, or "sea moth," is a newly-discovered type of arthropod that would have lived in the deep sea more than ...

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 ...

But Mosura was different. Instead of the familiar streamlined body with flaps and claws, this little predator had something ...