armor

Scientists solve 320-million-year mystery of reptile bone armor

armor bone study

Reptiles have been growing armor in their skin on and off for hundreds of millions of years, but scientists never fully understood how it evolved. A massive new evolutionary study shows these skin bones appeared independently in multiple lizard groups rather than coming from a single armored ancestor. Even more astonishing, Australian goannas lost this armor long ago — then evolved it back again millions of years later.

21/05/2026 sciencedaily

These tiny dinosaur fossils fooled scientists for 20 years

armor bone growth fossil Ankylosaurus Dinosaurus discovery

Tiny dinosaur fossils that puzzled scientists for over 20 years have finally revealed their true identity. Rather than belonging to a miniature species, they are actually baby ankylosaurs—some less than a year old, including a possible hatchling. By studying bone growth patterns, researchers confirmed these young dinosaurs hadn’t yet developed into full-sized adults. The discovery sheds new light on how ankylosaurs grew, showing they began developing armor surprisingly early.

21/04/2026 sciencedaily