Six tiny robots can pull a two-ton car
 

Stanford university's uBots have pulled off a feat that makes ants look like slackers. Working in concert, six of the robots managed to tow a 3,900 pound car, despite weighing just a half-ounce each -- much less than other car-towing robots. The secr...

http://www.engadget.com/2016/03/14/s...a-two-ton-car/