Have you ever wondered what makes shark skin so tough and sleek? It's dermal denticles—tiny, tooth-like structures that cover a shark's skin. Made of the same material as teeth and shaped like small ...

Scanning electron images show four types of denticle shapes found in bonnethead shark skin, arranged from least to most pointed (A–D). Samples come from juvenile and mature female sharks, revealing ...

Delta’s shark-skin-coated planes are a promising step toward greener air travel. But they also offer a quiet warning. At first glance, a shark’s skin looks smooth. But zoom in with a microscope and ...