Deep TimeCosmos & Earth

Asteroid ends the dinosaurs

66 million years agoTurning point

The Chicxulub asteroid wipes out non-avian dinosaurs and about three-quarters of species, opening the world to mammals.

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 → Asteroid ends the dinosaurs

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K-T extinction (Britannica) ↗