Forget about smaller and smaller microprocessors creating heat by running an electric current through them. Researchers Minsoung Rhee and Mark Burns at the University of Michigan have created an 8 bit processor using logic gates made of pneumatic valves. That's right, this processor is not powered by electricity but air.

See more at http://blog.makezine.com/archive/2009/09/claims_of_pnuematic_processor_full.html


And by the way, sometimes just saying something doesn't really seem right when all the signs elsewhere point out otherwise: http://godjonez.ath.cx/~godjonez/jing/2009-10-02_1430.png