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

Want to see some big and small dinosaurs, old dinosaurs, and less old—but still really old—dinosaurs? Nat Geo Explorer and Paleontologist Paul Sereno takes us inside the University of Chicago's Fossil Lab to uncover all kinds of dinosaur fossils, from ones you could cradle in your arms to a T. rex that probably never knew what hit it. Learn more about Sereno and his team's work to uncover fossils like these: https://on.natgeo.com/3JciNYJ | National Geographic Science