Early robot voyagers: Looking at the beginnings of explorer robots -- Robots on the move: Robots that roll, crawl, and walk around -- Robots in extreme zones: Robots that venture into dangerous places -- Undersea voyagers: Robots that travel to the ocean depths -- Eyes in the sky: Sky and space watcher robots -- Robot racers: Vehicles that can drive themselves -- Biobots: Robots that mimic the world of nature -- Handy robots: Robots with sensitive hands and fingers -- Red planet rovers: Robots built to drive across the red deserts of Mars -- Comet catchers: Robot encounters with distant comets -- Voyages to infinity: Robot exploration of alien worlds -- Things to come?: The next steps in robot technology -- Reference : Time track: The story of robot voyagers ; Glossary: Robot terms explained.