Dinosaur

A Dinosaur guide. Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. Our knowledge about dinosaurs is derived from a variety of... [more]

A Dinosaur guide. Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. Our knowledge about dinosaurs is derived from a variety of fossil and non-fossil records, including fossilized bones, feces, trackways, and other impressions found in dig sites.