The robot from Florida-based Team IHMC Robotics takes a tumble as it tries to walk over rubble. This team came in second place and won a $1 million prize. DARPA Robotics Challenge hide caption

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The German service robot Toomas was designed to welcome customers and help them find items in a store. Joerg Sarbach/AP hide caption

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Shoppers view and take photographs of humanoid robot "Chihira" at the information reception desk of Mitsukoshi department store in Tokyo. Chris McGrath/Getty Images hide caption

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These robotic arms are part of a modular kitchen that's been set up so that the robot chef can find exactly what it needs. Moley Robotics hide caption

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DAR-1 is one of the many social robots with facial recognition abilities on display for the robot petting zoo at the South by Southwest interactive festival. Jack Plunkett/AP hide caption

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Kiva robots maneuver around one of Amazon's newest distribution centers on Sunday in Tracy, Calif. Brandon Bailey/AP hide caption

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Since it was built by the Texas A&M Engineering Extension Service in 1998, 90,000 emergency responders have come to "Disaster City" to climb over mangled steel and through derailed chemical trains. Lauren Silverman /KERA hide caption

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One of these penguins is not like the others — the chick in front is really a rover, designed by filmmakers and used by scientists to gather data. Huddle/John Downer Productions/BBC hide caption

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These little robots, called BlabDroids, ask people questions and video record their replies. The footage will be used to create a documentary. Courtesy of Alexander Reben hide caption

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A BigDog robot at Boston Dynamics in 2010. The BigDog is being developed to help soldiers carry heavy equipment in the field. It can follow a human being, walking across wet/sandy/rocky terrain, just like a dog would. Suzanne Kreiter/Boston Globe via Getty Images hide caption

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Rowbot is designed to fit in between the rows of crops. Moving up and down each row, a fleet of 20 bots could fertilize and monitor the corn crops during the growing season. Courtesy of Kent Cavender-Bares hide caption

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Humans and chimpanzees — like this individual at a zoo in Australia — are animals who have evolved to forge extensive and elaborate social connections. Lisa Maree Williams/Getty Images hide caption

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