Many pathways to this type of mechanosynthesis and other nanotechnologies are currently being pursued.[80] Among them are DNA origami[81] and DNA nanorobotics,[82] bio-inspired molecular machines,[83] molecular Lego,[84] single-atom qubits for quantum computing,[85] electron beam–based atom placement,[86] hydrogen depassivation lithography,[87] and scanning tunneling microscope–based manufacturing.[88] There are several stealth projects within these spaces that are making steady progress, and—considering that superhuman engineering AI will be available by the end of the 2020s to solve
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