Paleontologists

A mounted specimen of the type of tyrannosaur at the heart of new research that suggests these predators may have lived in groups. These skeletons are from a species named Teratophoneus curriei, and show an adult (left) and juvenile (right) at the Natural History Museum of Utah.

New Fossils Suggest Tyrannosaurs May Have Hunted in Packs

Researchers say the trove of four or five specimens found in southern Utah challenges the assumption that these predators were solitary

An artist's rendering of a newly described species of flying reptile named Kunpengopterus antipollicatus. The Jurassic-era pterosaur may be the earliest animal known to possess opposable thumbs.

A Prehistoric Flying Creature Nicknamed 'Monkeydactyl' May Have Climbed Trees Using Opposable Thumbs

The newly described Jurassic pterosaur may be the oldest animal known to possess opposable thumbs

These polished stones collected in Wyoming may have been carried some 600 miles from Wisconsin inside the stomachs of sauropods.

Stones Hint at Possible 600-Mile Dinosaur Migration From Wisconsin to Wyoming

Some 150 million years ago, prehistoric plant-eaters may have carried the rocks in their bellies to aid digestion

An illustration of the ancient shark Edestus heinrichi preying on a fish. Many ancient sharks had different jaws than modern sharks.

These Prehistoric Sharks Had Jaws Shaped Like Circular Saws and Sawtoothed Scissors

CT scans and visualization tools are now allowing scientists to recreate the weird cartilaginous structures of ancient predators

A new study suggests the lush, hyper-diverse rainforests of South America were shaped by the asteroid impact that killed off the dinosaurs.

How the Dinosaur-Killing Asteroid Spurred the Evolution of the Modern Rainforest

New evidence from fossil plants shows today’s South American rainforests arose in the wake of Earth’s fifth mass extinction

The recently recovered oviratorosaur fossil found in southern China is missing its skull and part of its vertebrae, but remarkably, the nest of 24 oval-shaped eggs were well-preserved.

For the First Time, Paleontologists Unearth Fossil of Non-Avian Dinosaur Incubating a Nest of Eggs

The find is the first evidence that oviraptorosaurs—also called 'egg thief lizards'—were nurturing to their young

Juveniles from species of massive carnivorous dinosaurs, such as Tyrannosaurus rex, may have out-competed species that would have otherwise succeeded as medium-sized adults, according to new research.

Why Medium-Sized Dinosaurs Are Often Missing From the Fossil Record

Study suggests huge carnivores like T. rex may have occupied the ecological roles of medium-sized predators as juveniles

Podokesaurus holyokensis, lived during the Mid-Jurassic period, 195-180 million years ago, in what is now Massachusetts and could sprint up to 9 to 12 MPH.

Meet Massachusetts' Official State Dinosaur

The 'swift-footed lizard' won 60 percent of 35,000 total online votes

An artist's rendering of a new species of mosasaur named Xenodens calminechari. The marine reptile was about the size of a porpoise and had serrated shark-like teeth.

Newly Discovered Marine Reptile Sawed Prey With Serrated Teeth

Researchers say the new species of mosasaur had teeth unlike those of any known reptile

The worms that burrowed in these tunnels may have been the ancestors of modern Bobbit worms, Eunice aphtoditois, and is the earliest known fossil of an ambush predator

Enormous Prehistoric Marine Worms' Lair Discovered Along Sea Floor

Trace fossils suggest that sand strikers drilled these underground tunnels

A paleontologist excavating a 98 million-year-old fossil which may belong to the largest land animal ever. Researchers first started unearthing the creatures remains in 2012 at the Candeleros Formation in the Neuquen River Valley, Argentina.

Dinosaur Unearthed in Argentina Could Be Largest Land Animal Ever

The skeleton is still far from complete but paleontologists say what they've found suggests the dinosaur may be more than 120 feet long

An artist's illustration of two gray wolves (lower left) vying with a pack of dire wolves for a bison carcass near the tar pits in Rancho La Brea roughly 15,000 years ago.

Dire Wolves Weren't Actually Wolves, DNA Analysis Reveals

Ancient DNA extracted from fossils shows the beast split off from Canis lupus and coyotes nearly 6 million years ago

By studying recent mass extinctions on islands like Hawaii, Dr. Helen James is painting a picture of bird biodiversity today. Her research involves digging up fossils in caves to study bygone species, like the Kioea.

Meet One of the Curators Behind the Smithsonian's 640,000 Birds

Helen James' work on avian extinction helps in understanding how bird species today respond to threats like human encroachment and environmental change

Researchers say some of this woolly rhino's internal organs may still be preserved.

Melting Russian Permafrost Yields New Woolly Rhino Specimen

Russian researchers say this may be the best-preserved woolly rhino ever found

A newly described python species named Messelopython freyi. The 47-million-year-old specimen is the world’s oldest known fossil record of a python.

Oldest-Ever Python Fossil Found in Europe

The 47-million-year-old snake pushes the evolutionary origins of the group back some 20 million years

There have been other ancient wolf remains found in places like Siberia, but finding a well-preserved specimen in Yukon is rare since the ground has to be permanently frozen and the animal must be buried quickly.

A 57,000-Year-Old Mummified Wolf Pup Was Discovered Frozen in Yukon Permafrost

The specimen sheds light on how different gray wolf populations migrated through North America

Centrosaurus had the first well-documented case of malignant bone cancer in a non-avian dinosaur.

The Top Ten Dinosaur Discoveries of 2020

Paleontologists uncovered a great deal about the “terrible lizards” this year

An artist's rendering of Ubirajara jubatus, a newly described dinosaur species featuring two sets of rods sticking out of its shoulders and a mane of fluffy proto-feathers.

With a Mane and Strange Shoulder Rods, This New Dinosaur Was Quite a 'Little Show-Off'

The chicken-sized carnivore was found in Brazil and researchers say it may have been quite colorful

An artist's illustration of a newly described species of ichthyosaur called Thalassodraco etchesi swimming in the Late Jurassic seas off the coast of England.

Amateur Fossil Hunter Discovers New 'Sea Dragon' Species on British Beach

Researchers think the new species may have been a deep diving specialist, due to its cavernous ribcage and enlarged eyes

The pterosaurs were flying reptiles that lived in the age of the dinosaurs. This is an artist's illustration of a member of the genus Pteranodon, which included some of the largest known flying reptiles. .

Study Reveals Humble Origins of Flying Pterosaurs

Tiny, flightless reptiles called lagerpetids may have given rise to the largest flying animal ever to have lived on Earth

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