The Oldest Dinosaur Was Nyasasaurus, Which Lived During the Middle Triassic and Stood 3 Feet Tall

Key Takeaways on the Oldest Dinosaur

• The oldest dinosaur was Nyasasaurus, which lived about 243 million years ago.
• Nyasasaurus lived during the middle Triassic when the supercontinent Pangea was still intact.
• Early dinosaurs were about the size of…