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Dinosaurs

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

The Ten Best Science Books of 2018

These titles explore the wide-ranging implications of new discoveries and experiments, while grounding them in historical context

Ichthyosaurs (Greek for "fish lizard") were large marine reptiles that lived alongside the dinosaurs during most of the Mesozoic era.

Like Whales and Dolphins, Prehistoric ‘Fish Lizards’ Kept Warm With Blubber

A new analysis of a pristine ichthyosaur fossil reveals that the prehistoric marine reptile had a layer of insulating fatty tissue

Cool Finds

Early Mammals Were Thought to Be Small and Unseen in the Age of Dinosaurs. An Elephant-Sized Fossil Complicates That Story

At a time when proto-mammals and other creatures were getting smaller, this dicynodont bulked up with the thunder lizards

A figure representing the Kayentatherium babies found with an adult specimen. They are the only known fossils of babies from an extinct mammal relative that lived during the Early Jurassic.

Weasel-Like Fossils Reveal Evolutionary Clues of the First Mammals

A protomammal known as Kayentatherium was discovered with 38 babies in 185-million-year-old rock

Artist's rendition of Mirarce eatoni.

New Research

This Dino-Era Bird Was as Advanced as Modern Species. So Why Did It Disappear?

An enantiornithine fossil found in the western U.S. sat in storage for 25 years before it was officially described

Assortment of bird eggs and a fossil theropod egg

Dinosaurs May Have Given Birds Their Colorful, Speckled Eggs

A new analysis of fossilized eggshells suggests diversely patterned eggs evolved much earlier than previously believed

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Smithsonian Voices

Meet the Real Rock Star of the New Dino Hall—the Fearsome Ceratosaurus

The dinosaur is finally giving up its secrets as it prepares for a long fight with a Stegosaurus

New Research

A Case of Mistaken Sea Monster Identity

Re-analysis of Kansas fossils show they come from a newborn Tylosaurus, which were born without their tell-tale toothy snouts

The Diplodocus dinosaurs were some of the largest to walk the planet.

Tiny Skull Illuminates the Lives of Giant Dinosaurs

The skull of a juvenile Diplodocus is one of the youngest of these dinosaurs ever found

Dynamoterror was about 30 feet long, hunting prey during the Late Cretaceous.

Newly Discovered Tyrant Dinosaur Stalked Ancient New Mexico

The Dynamoterror, a relative of Tyrannosaurs rex, lived millions of years before other known species of tyrannosaur

Bite marks on the pterosaur bone match up with the teeth of two prehistoric fish: a Saurodon (pictured here) and a Squalicorax.

Prehistoric Sharks Chowed Down on Pterosaurs

Even 83 million years ago, top carnivores considered wings a tasty treat

New Research

New Fossil Dubbed ‘Giant Thunderclap at Dawn’ Shows How Big Dinos Went From Two Legs to Four

A new species discovered in South Africa shows how dinosaurs went from bipedal beasts to four-legged giants like brontosaurus

An artist’s impression of the prehistoric bird from the early Cretaceous period that retained some pretty dino-like features.

This 127-Million-Year-Old Fossil Links Dinosaur and Bird Evolution

The dino-bird hybrid boasts a stubby tail, clawed wings and sharp teeth

Dinosaurs had some bad luck, but sooner or later extinction comes for all of us.

What Makes Some Species More Likely to Go Extinct?

With help from the fossil record, paleontologists are piecing together what might make one creature more vulnerable than another

Caelestiventus hanseni.

New Research

Rare Desert Pterosaur Fossil Discovered in Utah

The rare Triassic fossil is the most complete early pterosaur ever found, and gives new insight into the evolution of the first flying vertebrates

Smithsonian Voices

Why Curators Killed Hatcher, the 66-Million-Year-Old Triceratops

The popular dinosaur has a new starring role in the upcoming “Deep Time” exhibition—a meal for T. rex

An artist's rendering of the Lingwu Amazing Dragon

Cool Finds

‘Amazing Dragon’ Fossils Unearthed in China Rewrite Story of Long-Necked Dinosaurs

The dino family emerged 15 million years earlier than previously thought

The display will eventually yield a formidable and fully-formed beast standing at about 15 feet tall and 40 feet long, poised to glut on the body of an unlucky Triceratops.

Homecoming King: The Nation’s T. rex Returns to the Smithsonian

The fully assembled skeleton will be displayed for the first time at the National Museum of Natural History in June 2019.

Ricardo Martínez digging up the arm of the dinosaur Ingentia prima in Triassic layers of Balde de Leyes, San Juan Province, Argentina.

New Research

The Most Massive of Dinos Evolved Earlier Than Previously Thought

A Triassic giant unearthed in Argentina suggests that dinosaurs took the path to greatness at least twice

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