Cornell has designed a robot made of identical modules that can reproduce
itself
(http://www.mae.cornell.edu/ccsl/research/selfrep/selfrep_brief5.pdf). The
article suggest that self-reproduction "is a continuum dependent
on the amount of information being copied", referencing to a metric
developed by Adams and Lipson.
An ABC News article is available at
http://abcnews.go.com/Technology/wireStory?id=748180.
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