Learn how anacondas are defying expectations of reptile experts by keeping their ancient body size despite drastic ...

A tiny 242-million-year-old fossil from Devon is shaking up scientists’ assumptions about the earliest members of the lizard lineage. Instead of the expected skull hinges and palate teeth typical of ...

Some 80 million years before birds took flight, another group of creatures dominated the skies — the pterosaurs. These ...

Ichthyosaurs represent a diverse clade of Mesozoic marine reptiles that rapidly adapted to fully aquatic lifestyles following the end-Permian mass extinction. Their streamlined, 'fish-like' body plan, ...

Fossilized footprints discovered in southeastern Australia, dating back approximately 355 million years, have forced scientists to rethink the timeline of reptile evolution. Detailed in a recent study ...

An extinct reptile’s oddly shaped chompers, fingers, and ear bones may tell us quite a bit about the resilience of life on Earth, according to a new study. In fact, paleontologists at Yale, Sam ...

In most narratives, the story of evolution is the story of organisms emerging from the ocean and eventually populating the ...

WASHINGTON — Scientists in Australia have identified the oldest known fossil footprints of a reptilelike animal, dated to around 350 million years ago. The discovery suggests that after the first ...

The sprawling-upright transition across mammal evolution, showing changes in posture and limb bone shape. The transition from sprawling (reptile-like) to more upright (parasagittal) posture and ...