Birds are avian dinosaurs, and phylogenetic taxonomy includes over 11,000 extant species in the group Dinosauria. Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria. They first …

Dec 20, 2025 · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years.

Dinosaurs are a group of reptiles that first appeared about 245 million years ago. They dominated the planet until an extinction event wiped out a large swath of life on Earth about 66 million years ago. …

The Dinosauria Dinosaurs, one of the most successful groups of animals (in terms of longevity) that have ever lived, evolved into many diverse sizes and shapes, with many equally diverse modes of …

Scientists estimate over a thousand dinosaur species once roamed Earth. Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about …

Mar 27, 2025 · The word “dinosaur” isn’t a catch-all term for just any scaly, prehistoric giant. “There’s kind of a misconception that any big extinct thing was a dinosaur,” Smith says. In fact, dinos are a …

4 days ago · The Top Ten Dinosaur Discoveries of 2025, From Preserved Blood Vessels to the Return of a Short King With studies of fossilized bones, gut contents, eggshells and more, paleontologists …

Get your fill of dinosaur facts and fun, and find out all about the reptiles that once dominated our planet. Ever since they were first identified in the 1800s, dinosaurs have sparked the imagination of kids and …

Oct 17, 2019 · Discover what scientists study and know about dinosaurs that went extinct 65 million years ago.

1 hour ago · A T. Rex missing link, a spike-fossil and a raptor still eating its dinner are just a few of the interesting dinosaur discoveries in 2025.