Sea lampreys, also known as "vampire fish," are a highly invasive species in the Great Lakes. The parasite latches on to a host and sucks out the blood and other vital body fluids. The pandemic ...

A new study reveals that the sensitivity of teeth, which makes them zing in a dentist's chair or ache after biting into something cold, can be traced back to the exoskeletons of ancient, armored fish.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...