four-wing dinosaurs

Some dinosaurs seem to be flying before the evolution of birds, the newly discovered fossil has proved this.

Paleontologists have found the bird's fossil preserved in the stomach of a dinosaur. This is the first evidence that birds are a prey of dinosaurs and the world was a dangerous

What remains of the four-winged dinosaur, Anchiornis huxleyi, reinforces the notion that the ancestors of birds are bipedal dinosaurs that lived in the millions of years ago -