How an Asteroid Really Killed the Dinosaurs — And Could It Happen Again?

66 million years ago, a ~12 km-wide carbonaceous asteroid struck near Chicxulub, Mexico, triggering earthquakes, tsunamis, wildfires, and throwing vast amounts of dust and sulfur into the atmosphere—blotting out sunlight for years and collapsing ecosystems, wiping out ~75% of species including non-avian dinosaurs .

🚨 **In this video, we’ll explain:**

1. How the impact caused a global “impact winter” and acid rain that stopped photosynthesis .

2. Why the asteroid came from beyond Jupiter and carried rare metals like iridium and ruthenium—proof of its extraterrestrial origin .

3. Could it happen again? We look at planetary defense: how NASA’s DART mission and ESA tracking systems detect and deflect potentially dangerous near‑Earth objects .

🧩 Bonus: What if the timing or location had been different—could dinosaurs have survived?

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