Dinosaurs

The 8.5-millimeter millipede had five-unit compound eyes and an unusually hairless rear end

This Petite, 99-Million-Year-Old Millipede Was Entrapped in Amber

The diminutive arthropod represents not only a previously unknown species, but an entirely separate Callipodida suborder

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How the Geologic History of the Earth Provides Clues for Our Future

For Earth Day, Smithsonian paleobiologist Scott Wing reminds us that we can look to the fossil record to better understand human-caused global changes

Conditions were ripe for fossil-making when this tiny dinosaur walked through the mud some 120 million years ago. In the lower right corner of this image, you can even see splash mark from a rain droplet.

‘Exquisitely Preserved’ Skin Impressions Found in Dinosaur Footprints

The fossils were so well-preserved that the researchers could even see marks left by raindrops

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Smithsonian Paleontologist Hans Sues Is Taking Your Questions About Dinos, Humans and Even, Cats

Smithsonian's new YouTube series, "The Dr. Is In."

New Type of Arctic Dinosaur Discovered in Alaska

The duck-billed, crested lambeosaurine shows that a diverse array of dinos lived in the warmer but still harsh Arctic 70 million years ago

A partially exposed, 65-million-year-old fish from the Tanis deposit in North Dakota.

Fossil Site May Capture the Dinosaur-Killing Impact, but It’s Only the Beginning of the Story

The Tanis site in North Dakota contains evidence of the asteroid impact that killed off the dinosaurs

A bit of the ancient delta off the coast of Svalbard.

Earth's Largest River Delta Was the Size of Alaska

The Triassic Snadd delta between Norway and Russia lasted millions of years and was likely a biodiversity hotspot

International Expedition Will Excavate the Dino-Rich 'Jurassic Mile'

More than 100 paleontologists are heading to the fossil-filled Morrison Formation

Scotty’s skeleton is scheduled to go on view at the Royal Saskatchewan Museum in May 2019

Meet Scotty, the Largest and Longest-Lived T. Rex Ever Found

The dinosaur weighed an estimated 19,555 pounds and likely lived into its early 30s

An illustration of what Avimaia schweitzerae and its nest may have looked like.

First-Ever Fossilized Mother Bird Found With Unlaid Egg

The rare 110-million-year-old bits of shell shine light on the reproduction during the age of dinosaurs

Artist's impression of a Galleonosaurus dorisae herd on a riverbank in the Australian-Antarctic rift valley during the Early Cretaceous, 125 million years ago.

New Dinosaur Species Found in Australia Reveals a ‘Lost World’

<i>Galleonosaurus dorisae</i> thrived in the now-vanished Australia-Antarctica rift

Moros was probably about 170 pounds, or roughly the size or a deer.

Meet T. Rex's Teeny Cousin Whose Name Means 'Impending Doom'

A newly discovered tyrannosauroid provides insight into the 70 million year gap in North American tyrannosaur evolutionary records

An artist imagines what two Mnyamawamtuka would look like as they cavort in the Cretaceous rain

Meet the Dinosaur With the Heart-Shaped Tail Bone

The newly discovered long-neck dino could help scientists figure out why some dinosaurs grew to be so large

By analyzing fossilized vomit and droppings, scientists have determined that Smok wawelski was one of the first predators to crush the bones of its prey.

Prehistoric Crocodile Cousin Crushed the Bones of Its Prey Long Before T. Rex

Fossilized feces filled with bone reveal the feeding habits of an ancient predator

With just two rows of teeth, Edestus slid its lower jaw to slice apart its prey.

Scientists Model How Prehistoric Shark Cut Through Prey With 'Scissor Jaws'

The 330-million-year-old species <i>Edestus</i> had one of the most unique bites in natural history

An illustration showing what Galagadon would have looked like in life, swimming along the river floor.

New Prehistoric Shark Species Discovered Alongside Sue the T. Rex

The teeth of <i>Galagadon nordquistae</i> were discovered in the rock that once surrounded the famous <i>T. rex</i> skeleton.

The species Orobates pabsti represents a group of animals that lived after the first animals to walk on land but before the evolution of modern lizards.

Scientists Used a Robot to Study How Prehistoric Lizards Walked

OroBOT, a robot version of an ancestor to the dinosaurs, is helping fill in some gaps in the evolution of walking

Illustration of an adult and juvenile ankylosaur.

Armored Dinosaurs Kept Cool With a Labyrinth of Nasal Canals

A fluid dynamics study suggests the large and intricate passages in ankylosaurs' skulls were a great way to cool off in the Cretaceous

The collection of prints, including this Iguanodon one, reportedly represents the most diverse, detailed collection of Cretaceous fossils ever discovered in Great Britain

Trove of Well-Preserved Dinosaur Footprints Unearthed Along Sussex Coast

Researchers discovered more than 85 fossilized footprints left by at least seven prehistoric species

Although the asteroid strike that created Chicxulub crater in modern-day Mexico dramatically affected life on Earth, the fiery crash isn't the whole story of the fate of the dinosaurs.

We Still Don’t Know Why the Reign of the Dinosaurs Ended

The asteroid strike on the Yucatán Peninsula 66 million years ago is only part of the story

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