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Roughly 66 million years ago an asteroid slammed into the Yucatan peninsula. New research shows darkness, not cold, likely drove a mass extinction after the impact. Credit: NASA

Darkness, not cold, likely responsible for dinosaur-killing extinction

Burmese amber with Oculudentavis skull nearly perfectly preserved inside. Credit: Lida Xing

Hummingbird : Smallest Known Dinosaur Found in Amber

The new dinosaur is called Tralkasaurus, which means "thunder reptile" in the indigenous Mapuche language common in Patagonia. In this file photo, a boy in Melbourne, Australia inspects the teeth of a theropod dinosaur

Argentine researchers find distant Tyrannosaurus relative

The fossil of Gunakadeit joseeae, which was found in Southeast Alaska. About two thirds of the tail had already eroded away when the fossil was discovered. Credit: University of Alaska Museum of the North

New thalattosaur species discovered in Southeast Alaska

Allosaurus jimmadseni

New species of Allosaurus discovered in Utah

Illustrated scene of dinosaurs and asteroid.

In death of dinosaurs, it was all about the asteroid –...

The skull of the juvenile T. rex, "Jane", was slender with knife-like teeth, having not yet grown big enough to crush bone.

Researchers learn more about teen-age T. rex

Artist’s depiction of an ornithopod dinosaur tending its nest.

Baby dinosaurs found in Australia

A fossilized snail shell, ready to be analyzed in the laboratory

Earth was stressed before dinosaur extinction

An intimidating sight: Asfaltovenator vialidadi. Source: Gabriel Lio

Experiments in evolution

This slab of sandstone has been on display since 1896, showing off the scaly footprints of a prosauropod dinosaur. Scientists only recently realized that the deep grooves on the left may be the track of a sailing stone. Credit: Lull, R.S., 1915

Sailing stone track discovered ‘hiding in plain sight’ in dinosaur fossil

Illustration of the newly described Kupoupou stilwelli by Jacob Blokland, Flinders University. Credit: Jacob Blokland, Flinders University

When penguins ruled after dinosaurs died

New research is shedding light on how and where ancient flying reptiles called pterosaurs lived. Credit: Julius Csotonyi

95-million-year-old fossil reveals new group of pterosaurs

A representation of a plesiosaur - living reconstruction

Divers of the past : Plesiosaur – Why did the size...

CT scan-generated models of the jaws of Majungasaurus (left), Ceratosaurus (center) and Allosaurus (right), with microscopic views of the interior of their teeth below each model. Stripes running from upper left to lower right in each microscopic image are daily deposited incremental lines, which allow the amount of time it took for a tooth to grow to be reconstructed. Credit: PLOS ONE

Researchers determine dinosaur replaced teeth as fast as sharks

Fossilised 20 centimetre long hand claw of theropod discovered at Eric the West site on Victoria’s Otway Coast. Credit: Stephen Poropat/Museums Victoria

Huge-clawed predatory dinosaur discovery in Victoria

Photograph of the traces analyzed: : Megalosauripus transjuranicus (A) y Jurabrontes transjuranicus (B). Credit: Matteo Belvedere et al.

Jurassic dinosaurs trotted between Africa and Europe

Gigantic dinosaurs like the sauropod Diplodocus, which weighed over 15 tons and was longer than an 18-wheeler truck, would have had problems with potentially lethal overheating. Hot blood from the body core would have been pumped to the head, damaging the delicate brain. New research shows that in sauropods, evaporation of moisture in the nose and mouth would have cooled extensive networks of venous blood destined for the brain. Other large dinosaurs evolved different brain-cooling mechanisms, but all involving evaporative cooling of blood in different regions of the head. Credit: Life restoration by Michael Skrepnick. Courtesy of WitmerLab at Ohio University.

Huge dinosaurs evolved different cooling systems to combat heat stroke

A small, feathered theropod dinosaur, Saurornitholestes langstoni was long thought to be so closely related to Velociraptor mongoliensis that some researchers called it Velociraptor langstoni—until now. Credit: Jan Sovak.

Paleontologists discover complete Saurornitholestes langstoni specimen

Siamraptor skull reconstruction. Credit: Chokchaloemwong et al., 2019

Meet Siamraptor suwati, a new species of giant predatory dinosaur from...

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