Study links T. rex tiny arms to powerful skull evolution

20 Mwezi wa tano, 2026

Imeripotiwa na AI

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.

Researchers from University College London and the University of Cambridge analyzed 82 theropod species. They determined that reduced forelimbs evolved independently in at least five lineages, including tyrannosaurids. The link between short arms and strong skulls proved stronger than any connection to overall body size.

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Study solves mystery of reptile bone armor evolution

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.

Tiny fossils identified as baby ankylosaurs after 20 years

21 Mwezi wa nne, 2026 Imeripotiwa na 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.

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Fossil jaws reveal giant ancient octopuses as apex predators

Researchers have uncovered evidence that octopuses from the Late Cretaceous period, around 100 million years ago, grew to lengths of nearly 20 meters and hunted as top predators. The findings, based on well-preserved fossil jaws from Japan and Vancouver Island, challenge previous views of early octopus evolution. Professor Yasuhiro Iba of Hokkaido University led the study, published in Science on April 23.

Preserved blood vessels discovered in fractured T. rex rib

26 Mwezi wa nne, 2026 Imeripotiwa na AI

Researchers have identified preserved blood vessels inside a fractured rib bone from Scotty, the largest Tyrannosaurus rex specimen ever found. The structures, revealed using synchrotron X-rays, formed during the dinosaur's partial healing process 66 million years ago. The findings, published in Scientific Reports, offer new insights into dinosaur physiology.

Science