Simple Computation Using Dominos
An anonymous reader writes "When silicon fails to beat Moores law, maybe dominos can help. This guy has created a half adder in dominos as a proof of concept for domino computation. If he intends to make a full domino computer he's going to need an awful lot of dominos."
they're one use only gates... you'd need a hell of a big layout just to execute an add of a few bits.
How we know is more important than what we know.