Genz Mind on Instagram: "A dinosaur is a type of reptile that lived millions of years ago (around 230–65 million years ago) during the Mesozoic Era. They came in many shapes and sizes — some were small like chickens, others were giants like the Brachiosaurus. The most famous is probably the T-Rex. They went extinct about 65 million years ago, likely because of a giant asteroid impact, volcanic eruptions, and climate change. 👉 Quick facts: • Lived: 230 to 65 million years ago • Types: Herbivores