"Gadget Guy" Steve Greenberg shows off some cool inventions that can make everyday life a little easier.

A lot of robots are developed to physically replicate our actions and behavior, like a bipedal, balanced walk, a large range of motion, and the ability to perceive and interact with the environment.

On a cold Tuesday in London in 1926, a tallish but sickly and eccentric Scotsman invited members of Britain’s Royal ...