When two, three-wheeled Tri-ATHLETEs dock together and operate as one, their configuration makes one six-wheeled All-Terrain Hex-Limbed Extra-Terrestrial Explorer. NASA's Julie Townsend talks with Heather Paul about how this robotic rover can traverse extreme terrain by lifting its wheels up and over obstacles, lift heavy payloads such as lunar habitats, and transport cargo from the lunar lander.
