When considering the word "robot," the first image that comes to mind is often a cold, metal machine, often performing a single or limited set of functions. A robot may possess appendages that resemble human anatomy, like an arm or an eye, but those are purely functional.
Some engineers, however, are trying to perfect robots whose function is to be more like humans.
Just last week we learned about the world's first robot built entirely of advanced prostheses, from its limbs to its face to its advanced circulatory system. The Bionic Man, as the automaton is being called, can walk and even speak, thanks to a "a sophisticated chatbot program that can carry on a conversation," according to LiveScience's Tanya Lewis.
This robot isn't the only machine built to imitate a man. In this slideshow, explore robots that are, each in their own way, almost human.