Dang you guys. You are ruining a perfectly brainless movie by simple over analysis, and bringing credidible science into the picture. Emmerich movies are never based on true science(ID4,Godzilla), they are based the suspension of belief, and just plain obsured brainless fun. I enjoyed it fully because it succeded in doing exactly what it was supposed to. It provided 2+ hours of popcorn eatin brainless entertainment. Not to mention it had a state of the art soundtrack, nobody could argue with that!!!