Scientists in the US claim to have created zombie robots from reanimated frog cells, giving rise to a living organism never seen or created before which can perform important tasks while healing itself. These millimeter-wide "xenobots" were designed on a supercomputer using an evolutionary algorithm to create thousands of candidate designs. The winning designs can propel themselves toward a target and deliver a payload, and can also heal themselves when torn apart. The xenobots are constructed using stem cells harvested from the embryos of African frogs, the species Xenopus laevis, and could theoretically perform tasks ranging from highly-targeted medicine delivery inside the human body, to toxic waste clean-up after a spill or radioactive disaster, or even gathering microplastics floating in the Earth's oceans. via GIPHY "These are novel living machines," says Joshua Bongard, a computer scientist and robotics expert at the University of Vermont who co-led the new research. "They're