First of all, I don't find these types of images interesting ever since 9/11. The one of the crumbling Chrysler building is especially offensive to me. This stuff just isn't "cool" after seeing the horror of the real thing.
Regarding the discussion of whether a meteorite impact would look like a nuclear explosion, it's my understanding that it would. In fact, it could BE a nuclear explosion. Supposedly, the energy released by a large impact would create so much heat that it could induce nuclear fusion. Fusion is what makes the really huge explosions in hydrogen bombs. They use a fission reaction to achieve the extreme level of heat. The fission bombs dropped by the US in WWII had yields in the 20 kt range, NOT 20 megatons. The only bombs that powerful are h-bombs, in which a Hiroshima-sized bomb is just the trigger for a fusion reaction one hundred times stronger.
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Originally Posted by mSeattle
Why don't the suburbs ever get destoyed?
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It's part of a Hollywood conspiracy, funded by WalMart, Applebee's, and General Motors, to make cities look dangerous to make more people want to move to the suburbs.
Or, maybe because it's a lot more interesting/shocking to see the destruction of large buildings and familiar landmarks, rather than anonymous suburbia.
Also, in the case of movies involving an attack (rather than a natural disaster), the attacking force would want to concentrate on the area with the highest population density. For the same reason as above, attacks on the iconic parts of a civilization are also more psychologically damaging to the population. These reasons are unfortunately why we see real attacks, like 9/11, targeting the urban areas we love.
Lastly, cities just tend to be the location of movies far more often than suburbs. When a movie is set in a city, but not in the downtown area, it tends to be in an older area of detached housing. About the only time you see new car-dependent lookalike sprawl as the setting of a movie is when the anonymity and sterility of the location is a prominent theme in the movie.