Study solves mystery of reptile bone armor evolution

May 22, 2026

Reported by AI

A new evolutionary analysis has shown that skin bones in reptiles developed independently across multiple lizard lineages rather than from a single ancestor. Researchers traced the trait over 320 million years using fossils and computational methods. Australian goannas stand out for losing the armor and then regaining it millions of years later.

The study, published in the Biological Journal of the Linnean Society, combined data from 643 living and extinct species. It determined that most lizards first acquired osteoderms more than 100 million years ago during the Late Jurassic and Early Cretaceous periods. These bony structures likely aided survival amid changing climates and predators at the time of dinosaurs such as Brachiosaurus and Stegosaurus.

Study links T. rex tiny arms to powerful skull evolution

The tiny arms of Tyrannosaurus rex likely evolved as giant predatory dinosaurs shifted to using their massive skulls and jaws for hunting, according to new research. Scientists examined dozens of theropod species and found a strong connection between shrinking forelimbs and robust skulls. The study suggests this change occurred as predators targeted enormous prey.

Tiny fossils identified as baby ankylosaurs after 20 years

April 21, 2026 Reported by AI

Small fossils of Liaoningosaurus paradoxus, once thought to represent a miniature species of armored dinosaur, have been confirmed as juveniles, including some less than a year old and a possible hatchling. Researchers analyzed bone growth patterns to reach this conclusion, challenging earlier ideas about the animal's size and lifestyle. The discovery provides insights into early development of ankylosaurs.

Science

Organic molecules detected in 66-million-year-old dinosaur bones

Science

Early sponges lacked skeletons, new study finds

Science

Anchiornis dinosaurs had wings but could not fly

Virginia Tech student reconstructs rare dinosaur skull revealing new species

A crushed dinosaur fossil, long forgotten in a drawer, has been reconstructed by a Virginia Tech undergraduate, unveiling a new species of early carnivorous dinosaur. The specimen, named Ptychotherates bucculentus, belonged to the Herrerasauria group and lived near the end of the Triassic period. Its discovery suggests this ancient dinosaur lineage persisted until the end-Triassic extinction.

Research reveals key differences in dinosaur and mammal parenting

February 27, 2026 Reported by AI

New research suggests that young dinosaurs became independent quickly, forming their own groups and occupying different ecological niches from their parents, unlike mammals with extended parental care. This distinction could reshape understandings of Mesozoic ecosystems. The study, led by Thomas R. Holtz Jr. from the University of Maryland, was published in the Italian Journal of Geosciences.

Science