Small robot swimmers that heal themselves from
damage

Living tissue can heal itself from many injuries, but
giving similar abilities to artificial systems, such as robots, has
been extremely challenging. Now, researchers reporting in ACS’ Nano
Letters have developed small, swimming robots that can magnetically
heal themselves on-the-fly after breaking into two or three pieces.
The strategy could someday be used to make hardier devices for
environmental or industrial clean up, the researchers
say.