بحث عن الديناصورات
Feb 15, 2020· بحث عن الديناصورات Dinosaurs ("terrible, powerful, or wondrous lizards") were the dominant terrestrial vertebrate animals for over 160 million years, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous period (about 65 million years ago), when the Cretaceous–Tertiary extinction event caused the extinction of most dinosaur species.