Most people think of dinosaurs as big, ferocious and extinct reptiles. That's largely true, but there are some misconceptions. Dinosaurs came in all shapes and sizes. Dinosaurs were the largest land animals of all time, but a great number of dinosaurs were smaller than a turkey. Dinosaurs first appeared about 230 million years ago. They ruled the Earth for about 135 million years until an extinction event 65 million years ago wiped out all but bird-like dinosaurs. Scientists don't agree entirely on what happened, but the extinction likely was a double or triple whammy involving an asteroid impact, choking chemicals from erupting volcanoes, climate change and possibly other factors. Yet only the big, classic dinosaurs are extinct. Birds are living dinosaurs, most experts believe. Think of that next time a pigeon strafes you. Fossils show that some of the more advanced dinosaurs had feathers or feather-like body covering, but many of them didn't fly and probabl...
Best Hollywood and Bollywood Movies-watch latest movies,أفضل أفلام هوليوود وبوليوود تشاهد أحدث الأفل
Best Hollywood Movies, watch Latest hollywood movies, Bollywood Movies,,Best Hollywood et Bollywood Films-regarder les derniers filmsأفضل أفلام هوليوود وبوليوود تشاهد أحدث الأفلام