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Oldest Chelicerate Fossil Pushes Spider Lineage to 500 Million Years

The finding maps the roots of the chelicerate body plan to the mid‑Cambrian.

Chinese Fossil Trove Shows Complex Animals Evolved Before the Cambrian Explosion

New Triassic Croc-Line Reptile Grew From Four-Legged Juvenile to Bipedal Adult

Permian Tetrapod From Brazil Reveals Twisted, Plant‑Grinding Jaw

Oldest Articulated Bony Fish and Giant Megamastax Redraw Osteichthyan Origins

Tiny Teeth Found in Colorado Extend Range of Earliest Primate Relative

Ordovician Mass Extinction Set the Stage for the Rise of Jawed Fishes

Fossil Brain Scans Point to Rapid Origin of Pterosaur Flight

Fossil Endocasts Show Pterosaurs Evolved Flight-Ready Brains Independently of Birds

Rare C31 Chemical Fossils Strengthen Case That Sponges Were Among Earth’s First Animals

Jurassic 'False Snake' From Skye Described as New Species, Complicating Snake Origins

Ancient Armoured Fish Push Tooth Replacement Origins Back 380 Million Years

Researchers Recover 24-Million-Year-Old Proteins, Redrawing Rhino Evolution

Trace Fossils Push Back Cambrian Explosion by 15 Million Years

Triassic Reptiles Migrated 10,000 Miles Through Inhospitable Tropics

Landmark Study Chronicles 35-Million-Year Evolution and Extinction of Sloths

Study Confirms Teeth Evolved from Sensory Armor of Ancient Fish

Chicago Archaeopteryx Reveals New Insights into Early Bird Flight

Ancient Bone Analysis Reveals Echidnas’ Aquatic Ancestry

Study Reveals Mammals Transitioned to Ground-Based Living Before Dinosaur Extinction