re: Smoke 'em if you got 'em: Only blind luck keeping asteroids from hitting cities

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The earth doesn't have a huge surface area.

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Space isn't hitting the surface of earth. The Asteroids are and they are small in comparison to earth's surface area is my point. That and the fact that our most densely populated areas only cover like 2% of the earth's available land area (not the whole surface) make the odds very high that a direct impact on a city would happen.