The birth of DNA nanotechnology
Nanotechnology is about making, measuring and manipulating things that are very small - a nanometre is a billion times smaller than a metre. In 1982 a scientist called Ned Seeman started 'DNA nanotechnology'.
While DNA is copying or repairing itself it can grow branches like a tree. But these branches move up and down - imagine the trunk of the tree growing longer and shorter. Seeman realised that if the branches could be fixed in place, they could be used to build shapes out of DNA.
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