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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Tiny dinosaur fossil weighs less than a chicken

A nearly complete skeleton of a small predatory dinosaur discovered in Argentina has revealed new details about the evolution of alvarezsaurs. The 95-million-year-old Alnashetri cerropoliciensis weighed just 700 grams and challenges previous ideas about their anatomy and diet. Researchers suggest it had a broader range of prey than previously thought.

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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Lost fossils reveal diverse marine predators after Permian extinction

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Anchiornis dinosaurs had wings but could not fly

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150-million-year-old stegosaur skull unearthed in Spain

Decline in megafauna linked to shift in ancient stone tools

A new study suggests that the disappearance of massive herbivores in the Levant around 200,000 years ago prompted early humans to switch from heavy stone tools to lighter, more sophisticated ones. Researchers at Tel Aviv University analyzed archaeological sites and found this tool revolution coincided with a drop in large prey and a rise in smaller animals. The findings, published in Quaternary Science Reviews, propose that hunting smaller prey may have driven cognitive evolution.

Fossil jaws reveal giant ancient octopuses as apex predators

25 Mwezi wa nne, 2026 Imeripotiwa na AI

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.

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