Skepticism, Science & Pseudoscience

I'm not a chemist.
I'm not a structural engineer.
I'm not an architect.

But I can consult them. Ask questions, and evaluate data. Tens of Thousands of informed opinions are available.

Having watched Zeitgeist (tm) I feel it raised some legitimate questions. Physically speaking. Not talking about who did it, or why. Just purely the physical properties of the structures and the events.

When WTC towers fell they collapsed internally, and fell straight down into their own footprint. Neither one toppled. Any 3 of the internal columns could support the building. Jet fuel burns at a specific temperature. Objects in free fall travel at a specified rate. WTC7 wasn't hit. Many other scientifically based questions. No politics. No chicken little antics. No New World Order stuff.

When issues of forces behind events are examined, some (to me) alarming trends emerge. But I am just asking about the science. Is there a resource you can point me towards, that deals with these things? Or better yet, any of you who can explain this stuff, please do so.

I'd like to think I'm not a total dumbass. And not an alarmist either. I'm also not an anarchist, trying to build a case against a criminal government. JUST the science.

Let the flames begin!