An artist's reconstruction of Spinosaurus, showing a paddle-like tail that would have helped it swim.

Groundbreaking Fossil Suggests Spinosaurus Is First Known Swimming Dinosaur

Its paddle-like tail, unearthed in Morocco, suggests the Cretaceous carnivore ventured into the water to hunt

An artist's rendering of a fossil frog found on the Antarctic Peninsula.

Cool Finds

Paleontologists Find Antarctica’s First Frog Fossil

The find could help pin down when the South Pole turned icy

Cricosaurus suevicus is an ancient relative of modern crocodiles that spent its life in the ocean.

New Research

Like Dolphins and Whales, Ancient Crocodiles Evolved to Spend Their Time at Sea

Researchers tracked changes in the crocodilian creatures’ inner ears to learn how they moved into the sea

Researchers recently scanned some of the oldest dinosaur embryos in the world

Digital Reconstructions Reveal 200-Million-Year-Old Dinosaur Embryo’s Unusual Teeth

New scans suggest unhatched dinosaurs reabsorbed a set of teeth during development

Paleontologists crossing the Rio Yurúa in Amazonian Perú, with the Santa Rosa fossil site in the background.

More Than 30 Million Years Ago, Monkeys Rafted Across the Atlantic to South America

Fossil teeth uncovered in Peru reveal that an extinct family of primates, thought to have lived only in Africa, made it across the ocean

Sometimes, love lasts a lifetime—and then some.

Researchers Find Two Fornicating Flies Enshrined in 41-Million-Year-Old Amber

A treasure trove of new fossils unearthed in Australia reveals some raunchily-positioned bugs

This illustration is an artist's interpretation of what a toothed pterosaur may have looked like 100 million years ago.

Four New Species of Prehistoric Flying Reptiles Unearthed in Morocco

These flying reptiles patrolled the African skies some 100 million years ago

Stromatolites at Lake Thetis, Western Australia

Why It’s So Difficult to Find Earth’s Earliest Life

Debate over Earth’s oldest fossils fuels the search for our deepest origins

Asteriornis maastrichtensis, the world's oldest known modern bird, had a mashup of chicken-, turkey- and duck-like features.

At 67 Million Years Old, Oldest Modern Bird Ever Found Is Natural 'Turducken'

Remarkable fossil hints at the traits birds evolved just before an asteroid wiped their nonavian dinosaur kin

An artist’s depiction of Gunakadeit joseeae

215-Million-Year-Old, Sharp-Nosed Sea Creature Was Among the Last of Its Kind

Researchers gave the marine reptile the genus name <u>G</u>unakadeit in honor of a sea monster from Tlingit oral history

Mulleriblattina bowangi, a cockroach that lived in caves during the Cretaceous

Oldest Known Cave-Dwellers Are 99-Million-Year-Old Cockroaches

The pale-bodied pests belong to a family that’s still around today

View of Takarkori shelter from the west.

New Research

Fossilized Fish Bones in the Sahara Desert Show How Diets Changed With the Climate

Thousands of years ago, hunter-gatherers in the “green Sahara” ate mostly catfish and tilapia

This is a graphic reconstruction of a male Stupendemys geographicus swimming in freshwater.

Gigantic Turtles Fought Epic Battles 10 Million Years Ago—and Have the Scars to Prove It

Their shells were 10 feet wide and equipped with foot-long horns on both shoulders

The new dinosaur is called Thanatotheristes degrootorum.

Newly Discovered Tyrannosaur Was Key to the Rise of Giant Meat-Eaters

A partial skull found in Alberta helps put a timer on when the 'tyrant lizards' got big

An artist's impression of a pterosaur trying and failing to snag a cephalopod from the ocean

Pterosaur Tooth Found in Rare Ancient Squid Fossil

A tooth embedded in prehistoric cephalopod offers a glimpse into predator-prey interactions from 150 million years ago

Axolotls can regrow lost limbs, again and again, making them appealing to scientists who want to understand regeneration.

Some Salamanders Can Regrow Lost Body Parts. Could Humans One Day Do the Same?

In recent decades, the idea of human regeneration has evolved from an 'if' to a 'when'

A fossil of Parioscorpio venator, a 437-million-year-old scorpion that resembles modern species.

World’s Oldest Scorpions May Have Moved From Sea to Land 437 Million Years Ago

A pair of pristinely preserved fossils suggest scorpions have looked mostly the same since they first crawled onto land

To 17th-century scholars, it made perfect sense that fossils on mountain sides and deep in the ground had been left there in the wake of the biblical flood (above The Subsiding of the Waters of the Deluge by Thomas Cole, 1829).

Why This 18th-Century Naturalist Believed He’d Discovered an Eyewitness to the Biblical Flood

Smithsonian paleontologist Hans Sues recounts a colossal tale of mistaken identity

An artist's illustration of juvenile Tyrannosaurus rex, which were more fleet-footed than their adult counterparts

Teenage T. Rex Fossils Reveal Haphazard Growth Spurts

A new study reaffirms that two debated dinosaur fossils named Jane and Petey weren’t a separate species

An artist's illustration of Dendromaia unamakiensis, a 310-million-year old land-dwelling vertebrate that looked a like a modern monitor lizard, pictured here with its offspring

Lizard-Like Fossil May Represent 306-Million-Year-Old Evidence of Animal Parenting

Shortly after transitioning from sea to land, our egg-laying ancestors may have started parenting their young

loading icon