This is Rex, a $1 million "bionic man" built in the UK by roboticists Richard Walker and Matthew Godden. Rex was the star of a new Channel 4 documentary titled "How to Build A Bionic Man." Rex is outfitted with a variety of synthetic systems and appendages, from prosthetic limbs to a cochlear implant, artificial pancreas to retinal implant. He's now on display at the London Science Museum but will visit America in October to promote the Smithsonian Channel's US premier of the documentary, retitled "Cyborg/Frankenstein."

31-year-old amputee Zac Vawter made medical history Sunday, climbing 103 stories of the Willis Tower with a state-of-the-art bionic leg controlled by electrical impulses from the muscles in his upper leg, including a rewired hamstring. He finished the climb in 45 minutes. More at the Chicago Trib, and CNN.