The goal for many amputees is no longer to reach a 'natural' level of ability but to exceed it, using whatever cutting-edge technology is available. As this new generation sees it, our tools are evolving faster than the human body, so why obey the limits of mere nature?

Looking ahead, future generations may learn their social skills from robots in the first place. The cute yellow Keepon robot from Carnegie Mellon University has shown the ability to facilitate social interactions with autistic children. Morphy at the University of Washington happily teaches gestures to children by demonstration.

Demolition is a part of construction.

Each new generation builds on the work of the previous one, gaining new perspective. New verbs are introduced. We Google strange and dangerous places. We tweet mindlessly to the cosmos. We Facebook our own grandmothers. I, for one, don't want to be left behind.

As a kid I wanted to write science fiction, and I was never without a book. Later I really got into being a scientist and never thought I'd be writing novels.

I was writing a scene where a guy was choking another guy to death. You can go online and type 'chokeholds' and watch scenes where martial artists choke each other out. You can hear what noises they make when they go unconscious, see how their bodies flop and everything. YouTube is amazing for the more detailed stuff.

Humans are inscrutable. Infinitely unpredictable. This is what makes them dangerous.