This is future spyware too:
EVANSTON, Ill. — A miniature robotic crab tinier than a flea has become the smallest-ever remote-controlled robot. Measuring just a half-millimeter wide, it can walk, bend, twist, turn, and even jump.
The remarkable record-breaking micro machine was developed by engineers at Northwestern University and comes in the form of a tiny peekytoe crab. The same team also developed millimeter-sized robots resembling inchworms, crickets, and beetles.
Although the research is exploratory at the moment, they believe the technology might bring the field of robotics closer to realizing micro-sized robots that can perform practical tasks inside tightly confined spaces. The researchers also produced a winged microchip last year that was the smallest-ever human-made flying structure.