Self-replicating robots are no longer the stuff of science fiction. Scientists at the Cornell University in Ithaca, New York have created small robots that can build copies of themselves. Each robot consists of several 4-inch (10-centimeter) cubes that have identical machinery, electromagnets to attach and detach to each other and a computer program for replication. The robots can bend and pick up and stack the cubes. Although the machines we have created are still simple compared with biological self-reproduction, they demonstrate that mechanical self-reproduction is possible and not unique to biology," Hod Lipson said in a report in the science journal Nature on Wednesday.
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