Good question!

Probably all kinds of physics stuff!

Density? You know, pile it all up and the dark amounts to black. I mean dust is particles, light reflects of it, stuff like that...

Probably depends on the surface as well. Dust on white stuff always looks darker than it does on black, for instance, IMO. But yeah, that density stuff Veef mentioned as well.

I say it's actually just the light each takes in. Wipe dust up with a black cloth, it's still white, just like when it was on whatever it was on.

It's because of EW.

'Cause shut up

The micronic conflugulizer autodilates the freon triemitter beam, of course.

Hm...that's kind of like saying, "Why is the sky blue?": The real explanation is so boring and un-romantic that it's more fun to wonder.^.^

-Raia-