Nasa Asteroid Updates: Agency Admits No Defense Against ‘City-Killer’ Space Rocks

On February 18, 2026, NASA shared a rare and unsettling update about the growing asteroid threat to Earth. Agency officials confirmed that thousands of large space rocks, known as “city-killer” asteroids, remain undetected, and there is no ready defense system to stop them if one heads our way. These asteroids are big enough to wipe…