A rendering of Clavusodens mcginnisi, or “McGinnis’ nail tooth,” an ancient shark that stalked the ocean floor 340 million years ago. Rendering courtesy of the National Park Service A shark no larger ...

Editor’s note: Every year, hundreds of undergraduates at the University of Delaware pursue research under the guidance of a faculty mentor. Such experiences provided by UD — a nationally recognized ...

Want to know what a sand tiger shark has been eating? Look to its teeth. Peter Pinnock / Alamy Stock Photo This article is from Hakai Magazine, an online publication about science and society in ...

Before we start talking about tiger shark teeth, get to know the shark that these teeth come from. Tiger sharks, like many other shark species (but not all of them), are solitary creatures. They tend ...

Shark teeth are a marvel of evolution. They are so sharp that many island cultures once used them as weapons and tools to hunt and cut up meat. Unlike human teeth, shark teeth line the mouths of these ...

“Shark teeth, despite being composed of highly mineralized phosphates, are still vulnerable to corrosion under future ocean ...

Scientists have identified more than a dozen species of prehistoric sharks and rays that once lived in a single marine ecosystem, providing a fascinating glimpse into this ancient world. The sharks ...

In historic discovery relayed by Kentucky’s Mammoth Cave National Park, paleontologists have come up with the first open ...

Another new species of ancient shark has been discovered at Mammoth Cave National Park.According to a post from the park, an ongoing Paleontological Resource Inventory discovered the new species while ...

One of a blacktip reef sharks’ top teeth as seen under a scanning electron microscope. “It’s not only shells, corals, and mussels that are impacted by ocean acidification,” Maximilian Baum, lead study ...

A shark fossil found in Alabama dating back 65 million years is a new species, the nonprofit McWane Science Center in Birmingham announced this week. The fossils the center examined were unearthed ...

A previously unknown species of ancient shark has been discovered in Kentucky's Mammoth Cave National Park, home to the world's longest cave system. The system, which is located in the state's ...