Watch this little robot; it's like a pet who won't give up!
RHex is a man-portable robot with extraordinary rough terrain mobility. RHex climbs over rock fields, mud, sand, vegetation, railroad tracks, telephone poles and up steep slopes and stairways. RHex has a sealed body, making it fully operational in wet weather, in muddy and swampy conditions, and it can swim on the surface or dive underwater.
RHex is made by Boston Dynamics, and is controlled by a remote operator up to 600 feet away. http://www.bostondynamics.com/content/sec.php?section=RHex -via Dark Roasted Blend