Dust to Dust?

I want to know more about dust. Dust particles are probably little pieces of something else, but what happens to them when they get to be as small as something can get? Wouldn't it be neat to be able to tell what each speck came from? What happens to them all anyways? Can they be reformed and combined to make new stuff? If not, where do they all end up? I'm sure you could glue them all together and make something, but whatever you make would just be a combination of parts of other things. Dust is freaking me out, man. I think some pieces of it are skin flakes, so there's little body parts all over the place too. Then there's saw dust. Dude, I heard the coolest thing ever about saw dust. You know how back in the olden days, before refrigeration, they used to keep ice in icehouses with sawdust (because sawdust is an insulator)...Well, some guy figured out that if you mix 14% sawdust with 86% water and then freeze it, you get a form of ice that is like a million times stronger and it melts a million times slower! It's called Pykrete (the guy's name was Pyke so Pyke + Concrete = Pykrete). I want to make some. They were going to build a huge aircraft carrier out of it and keep it cooled with internal cooling pipes. It would've been naturally bouyant even as a solid lump, so you can imagine how bouyant it would be with hollowed out chambers inside for crew and equipment. I saw a guy slamming a block of it with a hammer and he was barely making dents in it. Friggin amazing.