DTA Molecule's Nano Steps

In 2004, researchers demonstrated that the organic molecule 9,10-Dithioanthracene (DTA) could "walk" in a straight line on a metal surface by mimicking bipedal motion. During their experiments, the molecule took 10,000 nano-scale steps on a flat copper surface, with its sulfur-bearing linkers acting like feet that alternately lifted and propelled it forward.