Fossil findings shed light on a little-known group of Cretaceous-era beasts—and indicate that the combination of a large head and diminutive arms was no evolutionary fluke.

Two studies show negligible rates of aging in some types of turtles and other cold-blooded creatures, but that doesn’t mean they’re immortal.

Deletions in the sleepy lizard genome leave it without an important type of T cells found in most other vertebrates.

The study estimates that one-fifth of reptile species worldwide are at risk of extinction.

A research group argues that a species’ number of neurons, rather than brain volume, should serve as indicator of cognitive capacity when studying brain evolution, but some experts voice doubts.

Research in recent decades has explored how animals other than humans perceive different numbers of objects

The Princeton University evolutionary biologist studies how animals are changing due to human activity.

Researchers discover that rattlesnakes change their rattling frequency when a perceived threat approaches—tricking humans into thinking the snake is closer than it really is.

The color morph’s bright yellow hue and its propensity for skin tumors both likely stem from a gene implicated in a dangerous form of human skin cancer, suggesting the animals could make an ideal model for studying the disease.

Scientists injected unfertilized anole lizard eggs with CRISPR-Cas9 to produce albino offspring.

Researchers describe the remains of a clutch of extinct mammal-like animals.

The brown tree snake has wreaked havoc on the island of Guam, but one solution to the problem could lie in the serpent’s own physiology.

See how the tiny island of Guam became overrun with brown treesnakes, and learn what biologists are doing to try to eradicate the invasive species.

The fossil booty includes some eggs with embryo remains inside, and points to group nests involving long-term parental care.

Researchers are trying to recreate an extinct species of the lumbering reptiles by breeding closely related species that contain traces of the lost lineage’s DNA.

The turtle-headed sea snake is losing its stripes, and researchers suggest that the change reflects adaptation to fouled oceans.

The giant lizards have numerous microbicidal compounds in their blood.

Watch Komodo dragons bring down a buffalo.

Geckolepis megalepis escapes its predators by rapidly detaching its fish-like scales.