“Dinosaurs” is a term used to describe a diverse group of reptiles that lived on Earth millions of years ago. They were the dominant land animals for over 160 million years, from the late Triassic period around 230 million years ago until the end of the Cretaceous period around 65 million years ago. Dinosaurs came in various shapes and sizes, ranging from small, bird-like creatures to massive, long-necked sauropods and fearsome predators like Tyrannosaurus rex. They are classified into two main groups: Saurischia (lizard-hipped dinosaurs) and Ornithischia (bird-hipped dinosaurs), based on the structure of their hip bones. Dinosaurs are a fascinating subject of study in paleontology, helping us understand Earth’s ancient past and the evolution of life on our planet.