A nanotechnologist has created the world's smallest and most
plentiful smiley, a tiny face measuring a few billionths of a metre across assembled from strands of DNA.
Dr Paul Rothemund at the California Institute of Technology can make 50 billion smileys, each a thousand times smaller than the diameter of a human
hair, with his technique.
DNA has long been known for its versatility as a microscopic building block.
The molecule can be 'cut' using enzymes and reassembled using matching rungs in its double-helix structure.
This theoretically opens the way to making DNA quantum computers and nano-level devices including injectable robots that can monitor the body's
tissues for good health.
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What will they come up with next? I'm waiting for a nano-animated gif
Hehe, that's cool. Not terribly useful in and of itself, but the technology behind the smiley is quite impressive. Kinda reminds me of the
nano-guitar one of my profs made several years ago...
Up until computers were invented, the word 'virus' was reserved for organic entities.... computers came around, and 'virus' took on a whole new
meaning... once they start building things like computers from DNA... will we revert back to the old definition of 'virus'? Forget corrupting data
files or software, they'll be able to corrupt (mutate) the computer itself (DNA)
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A nanotechnologist has created the world's smallest and most
plentiful smiley, a tiny face measuring a few billionths of a metre across assembled from strands of DNA. 
