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The extinction of dinosaurs is linked to an asteroid impact (the Cretaceous–Paleogene extinction event). Space agencies worldwide monitor near-Earth objects to provide early warning.
Low probability, but extremely high impact. A sufficiently large impactor could cause global firestorms, tsunamis, and a prolonged "impact winter" from dust and aerosols blocking sunlight, leading to mass starvation.
Current planetary defense efforts include detection and potential deflection missions (e.g., NASA's DART mission).
Misuse of AI and autonomous superintelligence risks.
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