I head up NASA’s asteroid warning division. This is how we’d alert the public if the world was about to end
If you’re reading this, an asteroid has probably not wiped out life on Earth yet. But in the event that our planet is in imminent danger of a world-ending strike, NASA has a special team tasked with warning everyone about the impending disaster. Lindley Johnson is lead program executive for NASA’s Planetary Defense Coordination Office,
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