Scientists have created the world’s first living,
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Scientists have created the world’s first living, self-healing (自愈) robots using stem cells from frogs. Named after the African clawed frog from which they take their stem cells, xenobots are less than a millimeter wide (0. 04 inches) — small enough to travel inside human bodies. They can walk and swim, survive for weeks without food, and work together in groups. These are “entirely new life-forms,” said project co-leader Michael Levin, director of the Allen Discovery Center.
The researchers removed living stem cells, which have the ability to develop into different cell types, from frog embryos (胚胎), and left them to incubate (孵化). Then, the cells were cut and reshaped into specific “body forms” designed by a supercomputer.” They’re neither a traditional robot nor a known species of animal,” said robotics expert Joshua Bongard. The cells then began to work on their own and even have the regenerative power; when the scientists cut the living robot almost in half, its cells automatically zippered its body back up.
Xenobots don’t look like traditional robots-they have no shiny clothing or robotic arms. Instead ,they look more like a tiny drop of moving pink flesh. The researchers say this is deliberate-this biological machine can achieve things typical robots of steel and plastic cannot do.” Traditional robots degrade (降解) over time and can produce harmful ecological and health side effects,” researchers said in the study. As biological machines, xenobots are more environmentally friendly and safer for human health, the study said.
