cownose rays, gummy sharks, and broadnose sevengill sharks. Despite the different tooth structures, none were altered by ethanol, bleach, or hydrogen peroxide, the chemicals often used to clean shark ...

Shark teeth from museum jaws can now reveal what sharks ate decades ago. New research shows preservation chemicals don’t ...

Two weeks ago, Miguel Cabrera hit a home run at Tropicana Field that landed in the Rays' cownose ray fish tank beyond the center field wall (see video below) and now PETA wants the tank closed ...

Teeth from sharks and rays can be used to study ... the researchers examined three species with different tooth structures: cownose rays, gummy sharks, and broadnose sevengill sharks.