The Powder Toy

I noticed when making a compact laser for the purpose of blasting things with heat (because blowing stuff up is fun!)    ...Photons seems to be able to travel through solid substances, incl...

A simple wall that blocks pressure or velocity but blocks no particles would be nice. I don't know if this is really feasible, seeing as how velocity seems to be intrinsic to gravity.  &nbs...

A random thought, but would it be possible to have "Antimatter" as a gas? A substance that is a gas at extremely low temperatures, a liquid at middle, and a solid at extremely hot temperatu...

I know well enough from working with wxSand that anything resembling a table of elements using particles like this is generally impossible due to the sheer number of possible combinations of elements...