A newly described species from the Burgess Shale had three eyes, clawed limbs, and a tail full of gills—plus internal organs ...

More than 500 million years before “The Simpsons” introduced us to Blinky, a fish with an extra eye swimming through ...

Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives ...

New research from the University of Chicago reveals that teeth may have evolved from sensory armor in ancient fish.

Scientists have uncovered evidence suggesting that human tooth sensitivity—those sharp jolts from a cold drink or a sudden ...

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

Scientists have uncovered a remarkable fossil from Canada's Burgess Shale, a discovery that reshapes how the evolution of ...

Sharks, skates and catfish also have tooth-like structures called denticles that make their skin feel like sandpaper. When ...

A fossil once believed to reveal the origin of mollusks turns out to belong to one of Earth’s weirdest ancient creatures ...

Mosura fentoni was a trailblazer for modern arthropods, developing adaptations that some crustaceans and arachnids re-evolved ...

New research shows that dentine, the inner layer of teeth that transmits sensory information to nerves inside the pulp, first evolved as sensory tissue in the armored exoskeletons of ancient fish.

Paleontologists have discovered that a three-eyed sea moth predator lived on Earth half a billion years ago with evidence found in one of the most fossil-rich areas of the world.