Dinosaurs are amazing creatures of the worlds past. They are widely misunderstood though. Most think that they are cold blooded lizards that killed for fun, but this is huge misunderstanding. Dinosaurs are huge, and tiny, mean, and kind. One of the biggest misnomers though is their relation to lizards. They are not cold blooded killers and are not relatives of any living creatures. They are creatures of the past and possibly the future.
They lived in 3 different time periods, Triassic, Jurassic, and Creataceous.
By Steveoc 86 from https://commons.wikimedia.org Iguanodon.jpg Licensing cc-sa