Dinosaurs

Hesperornithoides miessleri was a feathered dinosaur with many features we now associate with birds.

Discovery of Raptor-Like Dinosaur Adds a New Wrinkle to the Origin of Birds

A small, 150 million-year-old dinosaur unearthed in Wyoming ran on the ground, but it may have been closely related to some of the first fliers

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Reflections on the New Fossil Hall From the Experts Who Created It

The team behind the Smithsonian's new dinosaur and fossil hall reflect on what "deep time" means to them.

This Little Brazilian Dinosaur Ran Across the Desert on One Toe

The recently unearthed dog-sized theropod is a rare example of monodactyl dinosaurs

Pterosaurs May Have Flown as Soon as They Hatched

A new analysis of the flying reptile's embryos indicates the bones needed for flight were highly developed in the egg

Using a geologist’s magnifying glass, Erin DiMaggio carefully scans a piece of volcanic ash in search of tiny minerals that hold the key to determining the age of nearby fossils.

How Do Scientists Date Fossils?

Geologists Erin DiMaggio and Alka Tripathy-Lang explain techniques for targeting the age of a fossil find

The sequoia tree slab is an invitation to begin thinking about a vast timescale that includes everything from fossils of armored amoebas to the great Tyrannosaurus rex.

A 16-Million-Year-Old Tree Tells a Deep Story of the Passage of Time

To explain the exceedingly long life of the planet, the Smithsonian’s new fossil hall designers began with this arboreal wonder

How do parts of ancient creatures, like this fossil skull of an extinct herbivore, Miniochoerus from 33 million years ago, manage to survive and end up in a museum exhibition?

How Do Fossils Form?

Learn from the Smithsonian’s curator of vertebrate paleontology Anna K. Behrensmeyer, a pioneer in the study of how organic remains become fossils

The nuance of the new exhibition, "Fossil Hall—Deep Time," plays out in elaborate art, entertaining digital displays and magnificent fossil displays. But don't miss the small stuff.

Here Are 12 Things You Might Miss in the Smithsonian's New Fossil Hall

Hidden among the dinosaurs and megafauna, are these small details that make "Deep Time" all the more impressive

“In order to interpret the past," says Matternes (above), "you have to have a pretty good working knowledge of conditions in the present.”

Meet the Master Muralist Who Inspired Today's Generation of Paleoartists

The treasured Jay Matternes murals of lost Mesozoic worlds are featured in a new Smithsonian book

Artist's reconstruction of Fostoria dhimbangunmal, a newly described iguanodontian dinosaur.

Dinosaur Bones Shimmering With Opal Reveal a New Species in Australia

A discovery in an Australian opal mine remained unexamined for three decades—it turned out to be the most complete opalized dinosaur skeleton in the world

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Beyond Dinosaurs: The Secrets of Earth's Past

From the formation of Earth through the changing climates and creatures of the past, the Smithsonian's new Hall of Fossils explores our planet's Deep Time

"I’ve never lost the wonder," says Hans-Dieter Sues (above). "To be the first human to find and touch an extinct creature is a singular moment that cannot be easily put into words."

How Do Paleontologists Find Fossils?

Smithsonian’s Hans-Dieter Sues, who has collected fossil vertebrates in the U.S. and around the world shares some of his tips

Towering over the Fossil Hall is the plant-eating sauropod Diplodocus, which has been on display since 1931 and now is posed with tail in the air.

Amid All the Fossils, Smithsonian's New Dinosaur Exhibition Tells the Complex Story of Life

The much-anticipated exhibition is packed full of Mesozoic dinosaur drama, new science, hands-on discoveries and state-of-the-art museum artistry

The meat-eating predator Ceratosaurus tried to take down Stegosaurus, but the plant-eater got away and gained the upper hand.

Meet the Dinos of ‘Deep Time’

Of the 700 specimens that roam the Smithsonian’s new Hall of Fossils, these six standout dinosaurs make a big impression

Ultimately, to understand how the Earth’s carbon cycle works is to appreciate the human influence currently impacting it.

How Does Earth's Carbon Cycle Work?

Stanford University’s Katharine Maher explains the mechanisms that heat and cool the planet

T. rex moves in for the kill on a doomed Triceratops—an herbivore that existed mainly on a diet of palm fronds.

The 'Nation's T. Rex' Prepares to Make Its Smithsonian Debut

In a new exhibit about "deep time" at the National Museum of Natural History, <em>T. rex</em> is still the king

Reconstructed color patterns of Sinosauropteryx based on the pigmentation of fossil plumage. The dinosaur is portrayed in the predicted open habitat in which it lived around the Jehol lakes, preying on the lizard Dalinghosaurus.

The Colors of Dinosaurs Open a New Window to Study the Past

Old fossils and new technology are coloring in life’s prehistoric palette

Bedbugs, which were previously thought to be about 50 million years old, could be much older, new genetic and fossil evidence suggests.

Bedbugs Scurried the Earth Alongside the Dinosaurs 100 Million Years Ago

Researchers calculate that the pests evolved long before bats, which were thought to be their first hosts

Life reconstruction of the bizarre membranous-winged Ambopteryx longibrachium.

Newly Discovered Bat-Like Dinosaur Reveals the Intricacies of Prehistoric Flight

Though <i>Ambopteryx longibrachium</i> was likely a glider, the fossil is helping scientists discover how dinosaurs first took to the skies

An artist's rendering of how Suskityrannus hazelae may have looked.

When Tyrannosaurs Were Tiny

A new study describes an early T. rex relative that stood about three feet tall and weighed no more than 90 pounds

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