BUCKY REEVES / SCIENCE PHOTO LIBRARY BUCKY REEVES / SCIENCE PHOTO LIBRARY
Skeleton of a young dinosaur. Approximately 700 species of dinosaurs have been named. Dinosaurs lived during the Mesozoic Era, which includes the Triassic, Jurassic, and Cretaceous Periods. Their extinction can be attributed to a meteorite impact, release of volcanic gases, climate cooling, sea-level change, low reproduction rates, poisonous gases from a comet, and changes in the Earths orbit or magnetic field. Enhancement of 8T5079.
Model release not required. Property release not required.