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 ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...

Blue sharks possess a secret hidden in their skin: a sophisticated arrangement of microscopic crystals and pigments that create their brilliant blue appearance — and may allow them to change color.