Deep TimeLife & Evolution Dinosaurs appear 230 million years agoNotable Dinosaurs arise and dominate land for more than 150 million years. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear Community notesLoading notes… Learn more ranked by votesBookSteve BrusatteThe Rise and Fall of the Dinosaurs ↗Editor's pickVideoSearch on YouTubeorigin of dinosaurs Triassic ↗Editor's pick