NASA scientist warns there’s no way to stop thousands of city-killing asteroids from striking Earth
NASA planetary defense officer Kelly Fast warns that humanity is largely defenseless against up to 15,000 undetected “city-killer” asteroids, roughly 500 feet across, which could cause regional devastation. While large asteroids are tracked and smaller ones frequently hit Earth harmlessly, these mid-sized asteroids are difficult to detect because they orbit close to Earth and reflect little sunlight. To address this, scientists plan to launch the … Continue reading NASA scientist warns there’s no way to stop thousands of city-killing asteroids from striking Earth
