These tiny robots have superhuman strength

• These micro-robots, which are about the size of a Matchbox car, can pull 2,000 times their weight.
• It's called Ground MicroTug
• They come in two sizes, and the smaller one can even haul items up glass walls.
• So far, the robots have just been used in the lab to haul around weights, drag a full coffee cup across the table and move objects up a wall, 
• The engineers said the robots could be equipped with CO2 sensors and then sent into a burning building to find survivors. 
• each one only costs about $20 
• Display next month at the International Conference on Robotics and Automation in Seattle, Wash.