[A] team of six microrobots, weighing just 3.5 ounces in total, could pull a car weighing 3,900 pounds... Their new demonstration is the functional equivalent of a team of six
humans moving a weight equivalent to that of an Eiffel Tower and three
Statues of Liberty, Mr. Christensen said. The car is the one he uses for
commuting to campus. Part of the magic is the use of a special adhesive
that was inspired by gecko toes.