Paediatrics Nurse Crew Dinosaur Paediatrics Tote Bag

Dinosaurs were a diverse group of reptiles that lived millions of years ago, dominating the Earth during the Mesozoic Era, which spanned from about 230 to 65 million years ago. They came in various shapes and sizes, ranging from the massive, long-necked sauropods like *Brachiosaurus* to the fierce, carnivorous *Tyrannosaurus rex*. Some dinosaurs were herbivores, like *Triceratops*, while others were carnivores, such as *Velociraptor*. Dinosaurs are classified into two main groups: **Saurischia** (lizard-hipped dinosaurs, including theropods and sauropods) and **Ornithischia** (bird-hipped herbivores). The reason for their mass extinction around 65 million years ago is still debated, but a popular theory suggests a combination of an asteroid impact and volcanic activity triggered drastic environmental changes. However, their legacy lives on today through birds, which are considered the closest living relatives of dinosaurs.