Like many of you, I always assumed that Rosie O'Donnell had a masters in physics. I mean, why else would she be spouting off on national television that the WTC 7 was probably destroyed by a controlled detonation?

I actually make it a point to refer to Rosie's wisdom on every question I have in life. Right now I have a cold cheese sandwich sitting in my kitchen, but I'm not going to grill it until I find out from Rosie for certain that heat will melt cheese. She seems to have an understanding of these things my simple mind can't quite grasp.

At any rate, Popular Mechanics, just as it had done previously, explains to Rosie, and to everyone else, why the towers fell the way they did.