A chicken-sized dino, the oldest known in North America, has thrown a wrench in the widely accepted timeline of early ...

Ammonite fossils have been found across the globe ... fish mosaic triptych from the Green River Formation Lagerstätte, ...

Study finds the oldest known North American dinosaur fossil in Wyoming, challenging previous beliefs about dinosaur evolution.

Opalized ammonite fossils are some of the most unique and spectacular paleontological specimens. They were formed through a ...

The state of Wyoming is home to some of the best and most diverse fossil specimens on the planet. Due to their high quality and scientific value, fossils from Wyoming have been relocated to museums ...

Dinosaurs inhabited the Northern Hemisphere millions of years earlier than scientists previously thought, according to the ...

Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

A fragment of upper jaw fossil from the Early Cretaceous is among the oldest examples of a toothless amphibian in the fossil record ...

This small, chicken-sized dinosaur lived around 230 million years ago. Interestingly, this pushes back the timeline for dinosaur presence in the northern hemisphere by millions of ...

Nine-year-old Eli spotted a 200-million-year-old fossil in a rocky cliff face A nine-year-old fossil hunter had the find of his life when he stumbled on a 200-million-year-old ammonite. Eli was ...