Likely in the 1930s, someone split a flat fossil slab in half, leaving the skeleton on one side and the skeleton's outline on the other.

A Paleontologist Matched Two Halves of the Same Fossil Stored at Different Museums—and Discovered a New Species

Meet Sphenodraco scandentis, a tree-dwelling, lizard-like reptile that roamed around with the dinosaurs during the Late Jurassic period roughly 145 million years ago

Today's living night lizards—like Xantusia vigilis (pictured)—are descendants of a common ancestor that lived roughly 90 million years ago, well before the Chicxulub asteroid struck Earth 66 million years ago.

These Lizards Mysteriously Survived the Asteroid Strike That Killed the Dinosaurs—and Their Descendants Are Still Alive Today

Small and elusive night lizards probably persisted because they have slow metabolisms and like to hide out in rock crevices, a new study suggests

Some sebecids grew to lengths of 20 feet.

After Crocs and Lemurs Went Extinct on the Mainland, Many Survived on Islands for Millions of Years

Isolation allows creatures to thrive as their relatives perish due to the threats present on much larger landmasses

Bolg amondol raids an oviraptorosaur dinosaur nest in an artistic reconstruction of how the species may have looked and behaved.

A Jar of Fossil Bones Long Stored at a Museum Led Scientists to Discover a Goblin-Like Lizard From 76 Million Years Ago

Fossils described in a new study speak to a previously unknown large-bodied lizard diversity that existed alongside dinosaurs

Hikers spotted the creature at the 10,882-acre Joseph D. Grant County Park last week.

A Large, Invasive Lizard Was Spotted in a California Park

Hikers at Joseph D. Grant County Park, just outside of San Jose, saw an Argentine black and white tegu last week—and rangers are now searching for the out-of-place reptile

Researchers took a closer look at fossilized footprints—including these cat-like tracks—found at John Day Fossil Beds National Monument in Oregon.

50-Million-Year-Old Footprints Open a ‘Rare Window’ Into the Behaviors of Extinct Animals That Once Roamed in Oregon

Scientists revisited tracks made by a shorebird, a lizard, a cat-like predator and some sort of large herbivore at what is now John Day Fossil Beds National Monument

A male central Fijian banded iguana from Ovalau Island, Fiji.

Iguanas Floated a Whopping 5,000 Miles From North America to Fiji on Rafts of Plants in a Record-Setting Trip, Study Suggests

Since most iguana species live in the Americas, biologists have long debated how they could have arrived on the remote Pacific island in the first place

Sombrero ground lizards (Pholidoscelis corvinus) are endemic to Sombrero Island, north of Anguilla, which means they're found nowhere else on the planet.

This Once-Rare Lizard Bounced Back From the Brink of Extinction After ‘Painstaking’ Restoration Efforts in the Caribbean

In 2018, fewer than 100 Sombrero ground lizards remained on Sombrero Island—but now, more than 1,600 of the critically endangered reptiles are scampering around the limestone landscape

A Komodo dragon flicks its tongue out on Komodo Island, part of Komodo National Park in Indonesia.

The Most Infamous Komodo Dragon Encounters of the Century, From a Fatal Attack on an 8-Year-Old Boy to a Zookeeper Bitten by a Battling Animal

As tourism to see the endangered species is on the rise and their habitat decreases, on some very rare occasions, the animals bite

A coating of iron on Komodo dragons' teeth could help keep them sharp for tearing into prey, as well as protect them from digestive acids.

Komodo Dragons Have Iron-Coated Teeth, Study Finds

New research provides the first evidence of the adaptation in a carnivorous reptile, and it might hold clues to understanding the teeth of dinosaurs

Asteroid impacts and volcanism have led to mass extinctions on our planet.

Has Life on Earth Survived More Than Five Mass Extinctions?

Scientists aren’t just arguing whether humans are causing a sixth mass extinction event now, but whether many more occurred in the past

Exceeding 50 feet in length, Mosasaurus hoffmannii was among the largest mosasaurs.

Massive Mosasaurs May Have Evolved More Than Once

The predators, which were made famous in the “Jurassic World” franchise, likely arose at least three times

The cat-eyed snake slithers in the Peruvian Amazon.

A Serpentine ‘Explosion’ 125 Million Years Ago Primed Snakes for Rapid, Diverse Evolution

Researchers say an evolutionary “singularity” led to several small, quick changes in snake species, from legless bodies and flexible skulls to chemical-sensing abilities

An illustration of the Victorian grassland earless dragon, which, until February, had not been seen in the wild since 1969.

Scientists Find the ‘Extinct’ Victorian Earless Dragon, Not Seen Since 1969

Once thought to be gone from the wild, the lizards will now enter a breeding program in an attempt to save them from the brink of extinction

One of the animal coffins, topped with a part-eel, part-cobra, human-headed figure

Lizard Remains Found Inside 2,500-Year-Old Coffins from Ancient Egypt

Researchers at the British Museum used neutron tomography to get a look inside the still-sealed metal boxes without damaging the artifacts

A Colorado checkered whiptail

These Lizards Stress-Eat When Loud Military Aircraft Fly Overhead

Colorado checkered whiptails on a U.S. Army base show increased stress levels and altered behavior after noisy jets and helicopters pass by, a study finds

An Anolis cristatellus lizard in Puerto Rico.

Genetic Mutations Could Help Lizards Survive City Life

Urban Puerto Rican crested anoles show genetic changes related to immune function, metabolism and limb and skin development

An illustration of Tetrapodophis, a lizard that was named based on a fossil likely smuggled out of Brazil to Germany

Why Smuggled Fossils Are Hurting Paleontology

Parachute science and lingering colonialism in fossil studies have negatively impacted the discipline

A chameleon’s exterior can dapple on demand with a remarkable variety of colors and patterns. Researchers are inching towards realizing that capability in robots.

Scientists Design a Robotic Chameleon That Crawls and Changes Color

A new artificial skin can sense its surroundings and create a camouflage coat

Out of the 900 baby lizards created by breeding Mr. Frosty (pictured above) with various other leopard geckos, 80 percent developed tumors before they were five years old.

Innovation for Good

This Gecko Named Mr. Frosty and His 900 Babies May Inspire Human Skin Cancer Treatments

A genetic mutation linked to melanoma in humans gives the lizards their lemony-hue—and triggers tumor growth on their scaly skin

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