A useful self-replicating machine could be less complex than a Pentium IV chip, according to a new study (PDF, 1.73 MB) performed by General Dynamics for NASA.
General Dynamics Advanced Information Systems recently concluded a six-month study for NASA’s Institute for Advanced Concepts that examined the design of “kinematic cellular automata,” a reconfigurable system of many identical modules. . . .The study also examined machine designs that would meet guidelines established by the California-based nanotech think-tank Foresight Institute to ensure the safety of self-replication techniques. The preliminary study is believed to be among the first U.S.-sponsored studies on self-replication in two decades.
This is quite significant. I hope we’ll see more research — instead of mere speculative pooh-poohing — on this subject.