The researchers noticed that ants can boost their power by using three out of six legs at once. "By considering the dynamics of the team, not just the individual, we are able to build a team of our 'microTug' robots that, like ants, are superstrong individually, but then also work together as a team," grad student David Christensen told the NY Times. Working in a similar fashion (albeit with wheels), the uTug robots can muster a force of 200 Newtons, or around 45 pounds. With their sticky tires, that's enough to slowly but surely pull a two-ton vehicle (see the video below).