Dinosaur families, known as clades, group dinosaurs based on shared characteristics and evolutionary history. For example, the Theropoda clade includes meat-eating dinosaurs like Tyrannosaurus rex and Velociraptor. These families help scientists understand how different species are related and how they evolved over millions of years. Another important family is the Sauropodomorpha, which includes long-necked dinosaurs like Brachiosaurus and Diplodocus. These herbivorous dinosaurs were known for their massive size and unique adaptations for feeding on tall vegetation. Studying these families provides insights into the diversity and ecological roles of dinosaurs during the Mesozoic era.