Dinosaurs are a highly distinctive group of vertebrates that played a dynamic role in terrestrial ecosystems for 165 million years of Earth's history. Fossils of their teeth and bones are found in abundance all over the world, sometimes along with evidence ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles