Nanobes - Life may be smaller than you think

kris writes "The existence of nano-sized organisms has been proposed for a number of years by geologists who refer to a range of mineralised structures in rocks as the fossil remnants of nanobacteria. Bacteria range in size from 150nm (Mycoplasmas)-50m in diameter while the proposed nanobacteria are an order of magnitude smaller with diameters reported to range from 20nm-150nm. How small can life be? See for yourself at the Nanoworld Image gallery. Can we build computers from microbes and nanobes? Or has this already happened in precambrian times? "